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Product Info for Plasticoid Black Rubber Stoppers, One-Hole 10-M291, Pack

These black, high percentage rubber stoppers are low in free sulfur and have a single hole to facilitate laboratory procedures. Stoppers sized as 000 through 0 have a 3mm diameter hole; the size 1 stopper has a 4mm hole. Stoppers sized as 2 and larger have a 5mm diameter hole. Remain resilient and pliable under most laboratory conditions.

Specifications for Plasticoid Black Rubber Stoppers, One-Hole 10-M291 :

Size:  10
Dia. of Top, mm:  50
Dia. of Bottom, mm:  42
Length, mm:  25
No./lb (Approx.):  9
Unit:  Pack
Last updated 2026-03-06 UTC.