VWR® Two-Hole Rubber Stoppers, Black
These black, high percentage rubber stoppers are low in free sulfur and have two holes to facilitate laboratory procedures.
- Stoppers remain resilient and pliable under most laboratory conditions
- Low free sulfur
Stoppers sized as 00 have 3mm diameter holes; the size 1 stopper has 4mm holes. Stoppers sized as 2 and larger have 5mm diameter holes.