Manufacturer: United Scientific Supplies
| Item # | Stopper Size | Top Diameter | Bottom Diameter | Pack Size |
| UNSST00 | 00 | 15mm | 10mm | 12 |
| UNSST0 | 0 | 17mm | 13mm | 12 |
| UNSST1 | 1 | 19mm | 14mm | 12 |
| UNSST2 | 2 | 20mm | 16mm | 12 |
| UNSST3 | 3 | 24mm | 18mm | 12 |
| UNSST4 | 4 | 26mm | 20mm | 12 |
| UNSST5 | 5 | 27mm | 23mm | 12 |
| UNSST5A | 5½ | 28mm | 24mm | 12 |
| UNSST6 | 6 | 32mm | 26mm | 12 |
| UNSST6A | 6½ | 34mm | 27mm | 12 |
| UNSST7 | 7 | 37mm | 30mm | 12 |
| UNSST7A | 7½ | 39mm | 31mm | 12 |
| UNSST8 | 8 | 41mm | 33mm | 12 |
Manufacturer Part Number/SKU: UNSST1-PK
Tags: stopper, silicone, inert