Auspex Scientific - The Exciting Science and Educational Store

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"Twistit" Rubber Stoppers 

Size 4

Twist one of the rubber protrusions off and the solid stopper becomes a one-hole stopper. Twist the other one off, and you have a two-hole stopper.

Made of soft, "white" natural rubber, with safe, convenient, countersunk, 5 mm holes.

Size 4

Top diameter 26 mm

Bottom diameter 20 mm

Height 25 mm

5 stoppers per pack.

NOTE: Only 1 order left in stock !!!

"Twistit" Rubber Stoppers - Size 4 10819$3.99