Rubber Stoppers - Size 7, Two-Hole
Top Diameter: 37 mm
Bottom Diameter: 30 mm
Approximate Number Per lb: 13
Hole Size: 5 mm
These black stoppers are made of solid, natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions. Low sulfur content. Withstand temperatures from -25°C to 70°C (-13°F to 158°F). Each stopper has its size marked in raised figures. Sold in 1-lb. bags.

