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: #4 – 1-Hole
Top Side: 1″ – 26 mm
Bottom Side: 3/4″ – 20 mm
Length: 25 mm
Diameter: 5 mm