Description

The rubber stopper is used in chemical laboratories in combination with flasks and test tubes. Machine fabricated from black rubber with a durometer (shore A) 48±5. Chemical resistant. To prevent liquid from leaking or escaping a container, the rubber stopper should fit tightly to the container's opening. 

Size: #12 – 2-Hole
Top Side: 2-1/2″ – 64 mm
Bottom Side: 2-1/8″ – 54 mm
Length: 25 mm
Diameter: 5 mm