These black stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with nonaggressive or concentrated solutions. Low sulfur content. Withstand temperatures from –13 to 158°F (–25 to 70°C.) Available in solid, one-hole, and two-hole versions. Each stopper has its size marked in raised figures. Sold as one-pound bags.
| Item No. | Stopper Size | Approximate Count per Lb. | Hole size |
| UN-RST0-H2 | 0 | 63 | 3mm |
| UN-RST1-H2 | 1 | 52 | 4mm |
| UN-RST2-H2 | 2 | 45 | 5mm |
| UN-RST3-H2 | 3 | 33 | 5mm |
| UN-RST4-H2 | 4 | 28 | 5mm |
| UN-RST5-H2 | 5 | 24 | 5mm |
| UN-RST5A-H2 | 5-1/2 | 21 | 5mm |
| UN-RST6-H2 | 6 | 18 | 5mm |
| UN-RST6A-H2 | 6-1/2 | 16 | 5mm |
| UN-RST7-H2 | 7 | 13 | 5mm |
| UN-RST8-H2 | 8 | 10 | 5mm |
| UN-RST9-H2 | 9 | 9 | 5mm |
| UN-RST10-H2 | 10 | 7 | 5mm |
| UN-RST10A-H2 | 10-1/2 | 7 | 5mm |
| UN-RST11-H2 | 11 | 6 | 5mm |
| UN-RST11A-H2 UN-RST12-H2 | 11-1/2 12 | 6 5 | 5mm 5mm |
| UN-RST13-H2 | 13 | 4 | 5mm |
MPN:
Caps and Closures/Stoppers
Custom Field
Quantity 1 LB
Color black
Style stopper