This category covers reusable glass apparatus for teaching, research and quality control labs. It includes test tubes in light-wall, rimless, side-arm and screw-cap styles (bakelite caps with rubber liners), graduated glass centrifuge tubes with stoppers or screw caps, crystallizing dishes, glass Petri dishes, evaporating basins, calibrated pycnometers, 300 mL B.O.D. bottles, and ground-joint pieces such as Claisen, vacuum, reducing and expansion adapters and stoppers. Larger setups include Soxhlet extraction apparatus, Kjeldahl distillation sets, water-jacketed flasks, distillation apparatus and organic chemistry glassware kits, plus porcelain and plastic spot plates.

Check the glass type first: borosilicate handles heating and temperature changes far better than soda glass. Match ground-joint sizes exactly, such as 24/40 or 29/42, so adapters, stoppers and flasks fit. Compare capacity, dimensions, wall thickness, graduation or calibration, closure type and pack quantity, and confirm the speed rating before using glass tubes in a centrifuge.

Reusable Glassware: common questions

What is a crystallizing dish used for?

A crystallizing dish is a shallow, flat-bottomed glass dish with straight sides. It is used to evaporate solutions so crystals can form, and also as a water or ice bath, a cover dish, or a container for holding small items. Borosilicate dishes can be heated gently, and versions with a spout make pouring easier.

When should I use glass centrifuge tubes instead of plastic?

Glass centrifuge tubes are chosen for organic solvents that attack plastics, for work where plastic leachables could interfere, and when tubes will be cleaned and reused. They can break under high forces, so use them only within the speed or g-force rating given by the maker, with properly fitting adapters or cushions in the rotor.

What does 24/40 mean on lab glassware?

24/40 is a standard taper ground-glass joint size. The first number is the approximate diameter in millimeters at the wide end of the joint, and the second is the length of the ground section in millimeters. Male (cone) and female (socket) joints with the same numbers fit together, and reducing or expansion adapters connect different sizes.

What is the difference between borosilicate and soda-lime glass?

Borosilicate glass has low thermal expansion, so it tolerates heating and rapid temperature changes much better than soda-lime glass and is more resistant to chemical attack. Soda-lime glass costs less and is used for items that are not heated, such as some jars and display pieces. For heating, autoclaving or flame work, choose borosilicate.

Reusable Glassware

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  1. Test Tube Flat bottom Glass, 25x 95mm, 30ml, with bakelite screw cap
    Manufacturer: Eisco Scientific LLC
    Test Tube Flat bottom Glass, 25x 95mm, 30ml, with bakelite screw cap (1 per EA )
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    was $2.24 Special Price $1.82
  2. Photoetch Coverslip 18x18mm German Glass
    Manufacturer: Bellco Glass Inc
    Ideal for florescence and confocal microscopy 520 alphanumeric coded squares .17-.19mm thick Each square measures 0.6mm x 0.6mm #1.5 thickness Facilitates mounting of micro-manipulated cells or chromosome spreads (25 per CS )
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    $82.25
  3. Adapter Reduction, Socket size 19/26, Cone size 24/29
    Manufacturer: Eisco Scientific LLC
    Adapter Reduction, Socket size 19/26, Cone size 24/29 (1 per EA )
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    was $14.71 Special Price $11.96
  4. 20ml Crystallizing Dishes Without Spout, Boro. Glass, Flat Bottom
    Manufacturer: Eisco Scientific LLC
    20ml Crystallizing Dishes Without Spout, Boro. Glass, Flat Bottom (1 per EA )
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    was $5.93 Special Price $4.82
  5. Test Tube, Calibrated (5 mL), glass
    SKU: 4023-EA
    Manufacturer: Taylor Technologies
    Test Tube, Calibrated (5 mL), glass (1 per EA)
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    was $0.60 Special Price $0.18
  6. Micro Glass Distillation Unit
    Manufacturer: Eisco Scientific LLC
    Micro Glass Distillation Unit (1 per EA )
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    was $209.35 Special Price $170.28
  7. Soxhlet Extraction Apparatus, cap. 100ml, Flask size 250ml.
    Manufacturer: Eisco Scientific LLC
    Soxhlet Extraction Apparatus, cap. 100ml, Flask size 250ml. (1 per EA )
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    was $119.64 Special Price $97.31
  8. Adapter Reduction, Socket size 19/26, Cone size 40/38
    Manufacturer: Eisco Scientific LLC
    Adapter Reduction, Socket size 19/26, Cone size 40/38 (1 per EA )
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    was $20.56 Special Price $16.73
  9. Hungate Tube Complete,16X125mm
    Manufacturer: Bellco Glass Inc
    The hungate anaerobic culture tube was developed for growing and maintaining anaerobic bacteria and culture conditions. method of hungate utilizes syringe methods for anaerobic. •Hungate Culture Tubes are designed for maintaining anaerobic culture conditions •Dimensions: 16mm OD x 125mm OAL •Material: Type 1 Class A Borosilicate •Case Quantity: 250 •Screw caps included, catalog #2047-16000 •Septum stoppers included, catalog #2047-11600 Technique: Exclude oxygen by flushing the tube with the desired gas. Add 4.5mL od pre-reduced anaerobic agar medium into tube. Seal the tube with the butyl rubber stopper and screw cap and autoclave. Innoculate with a syringe. Incubate in water bath. (250 per CS )
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    $459.43
  10. Glass Impeller Shaft, 3L Micro-Carrier
    Manufacturer: Bellco Glass Inc
    Type 1 Class A Borosilicate glass 7mm od x 300mm long Type 1 Class A boro for 3L spinners Glass Impeller Shaft, 3L Micro-Carrier (1 per EA )
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    $13.98
  11. United Scientific™ Glass Plates, 5in X 5in
    Manufacturer: United Scientific Supplies
    Plates made of clear soda lime glass, 2mm thick, with ground polished edges. Useful for a variety of general laboratory applications including as a cover, mixing surface, etc. (12 per PK )
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    was $19.00 Special Price $13.30
  12. Gas Tube Graduated, Borosilicate glass, cap. 50x0.2ml.
    Manufacturer: Eisco Scientific LLC
    Gas Tube Graduated, Borosilicate glass, cap. 50x0.2ml. (1 per EA )
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    was $11.96 Special Price $9.73
  13. Soxhlet Extraction Apparatus, 1000ml
    Manufacturer: Eisco Scientific LLC
    Soxhlet Extraction Apparatus, 1000ml (1 per EA )
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    was $375.78 Special Price $305.66
  14. 100ml Crystallizing Dishes Without Spout, Boro. Glass, Flat Bottom
    Manufacturer: Eisco Scientific LLC
    100ml Crystallizing Dishes Without Spout, Boro. Glass, Flat Bottom (1 per EA )
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    was $8.29 Special Price $6.74
  15. Hungate Tube Only,16x125mm
    Manufacturer: Bellco Glass Inc
    The hungate anaerobic culture tube was developed for growing and maintaining anaerobic bacteria and culture conditions. method of hungate utilizes syringe methods for anaerobic. •Hungate Culture Tubes are designed for maintaining anaerobic culture conditions •Dimensions: 16mm OD x 125mm OAL •Material: Type 1 Class A Borosilicate •Case Quantity: 250 •Screw caps included, catalog #2047-16000 •Septum stoppers included, catalog #2047-11600 Technique: Exclude oxygen by flushing the tube with the desired gas. Add 4.5mL od pre-reduced anaerobic agar medium into tube. Seal the tube with the butyl rubber stopper and screw cap and autoclave. Innoculate with a syringe. Incubate in water bath. (250 per CS )
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    $172.97
  16. Stainless Steel Sample Port Assembly 3/8 For 3L Bioreactor System
    Manufacturer: Bellco Glass Inc
    Ideal for 3l bioreactors Fits 3/8" hole Material: stainless steel 316l Dimensions: 9 3/16" oal Insertion length: 7 3/4" Tube: 1/4" od x 5/32" id with ra finish With hose barb Supply with: o-ring & stainless steel nut (1 per EA )
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    $334.37
  17. Condenser - Graham, Socket size 24/29 & Cone size 24/29, Effective length 40 cm.
    Manufacturer: Eisco Scientific LLC
    Condenser - Graham, Socket size 24/29 & Cone size 24/29, Effective length 40 cm. (1 per EA )
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    was $81.67 Special Price $66.43
  18. TEST TUBE, 25 X 150 MM, PK/16
    Manufacturer: Eisco Scientific LLC
    TEST TUBE, 25 X 150 MM, PK/16 (16 per PK)
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    was $21.40 Special Price $17.41
  19. United Scientific™ Glass Plates, 4in X 4in
    Manufacturer: United Scientific Supplies
    Plates made of clear soda lime glass, 2mm thick, with ground polished edges. Useful for a variety of general laboratory applications including as a cover, mixing surface, etc. (12 per PK )
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    was $15.25 Special Price $10.68
  20. Eudiometer Tube, 100 ml with electrodes
    Manufacturer: Eisco Scientific LLC
    Eudiometer Tube, 100 ml with electrodes (1 per EA )
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    was $43.78 Special Price $35.62
  21. Gas Jar Cylindrical, height 30cm, dia 5cm, Soda glass, without lid and heavy foot
    Manufacturer: Eisco Scientific LLC
    Gas Jar Cylindrical, height 30cm, dia 5cm, Soda glass, without lid and heavy foot (1 per EA )
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    was $14.24 Special Price $11.58
  22. Gas Jar Cylindrical, height 30cm, dia 7.5cm, Soda glass, without lid and heavy foot
    Manufacturer: Eisco Scientific LLC
    Gas Jar Cylindrical, height 30cm, dia 7.5cm, Soda glass, without lid and heavy foot (1 per EA )
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    was $39.84 Special Price $32.40
  23. Imhoff Sedimentation Cone, SAN, 1000mL, pk of 1
    Manufacturer: Brandtech Scientific
    SAN, transparent. DIN 12672. Screw cap allows drainage. Withstands temperatures up to 85 °C. (480 per PK )
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    $51.00
  24. TUBE, TEST, 25 X 250MM,PK/24
    Manufacturer: Eisco Scientific LLC
    TUBE, TEST, 25 X 250MM,PK/24 (24 per PK)
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    was $37.64 Special Price $30.61
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