VWR® Two-Hole Rubber Stoppers, Black Size 12
Bottom Diameter 54 mm Top Diameter 64 mm Lentgh 25 mm
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.