Get organized with this fun, interlocked rack. Rotate each of the four modules independently to configure for the tubes that you want to use. Made from polypropylene Suitable for a massive variety of culture, centrifuge, micro centrifuge, round, flat or conical bottomed tubes Polypropylene rack maintains its orientation until you twist it again. Two versions to cover smaller and larger tube requirements Tubes: 50 mL Wells:2 Well Dia: 29 mm Tubes: 10-15 mL Wells: 8 Well Dia: 20 mm Tubes: 15-20 mL Wells: 6 Well Dia: 16 mm Tubes: 10-13 mL Wells: 10 Well Dia: 13.5 mm Dimensions: 8.81 x 4.33 x 4.33 in (22.4 x 11 x 11 cm) 1/pk Color: purple, blue, green, yellow Autoclavable (5 per PK ) Learn More