RUBBER STOPPERS

SOLID, SINGLE HOLE & TWO HOLE RUBBER STOPPERS

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Solid Black Rubber Stoppers

Contain a high percentage of pure rubber and weigh less than neoprene. Constructed low in free sulfur (0.5%) with resiliency and pliability over a long period. Will not harden or crack. These stoppers are sold in packs of 1 pound each; the approximate quantity per pack is listed.

Single Hole Rubber Stoppers

Constructed wih low sulfur content. Stoppers below sized 000 through 0 have a 3 mm diameter hole; the size 1 stopper has a 4 mm hole. Stoppers sized as 2 and larger have a 5 mm diameter hole. Will not harden or crack under most laboratory conditions. These stoppers are sold in packs of 1 pound each; the approximate quantity per pack is listed.

Two-Hole Stoppers

Constructed with low sulfur content. Stoppers sized as 000 through 0 have 3 mm diameter holes; the size 1 stopper has 4 mm holes. Stoppers sized as 2 and larger are constructed with 5 mm diameter holes. Stoppers will not crack or harden with normal laboratory usage. These stoppers are sold in packs of 1 pound each; the approximate quantity per pack is listed.

Solid Neoprene Stoppers

Constructed without free sulfur to exhibit good resiliency and shelf-life without hardening or cracking. Neoprene is able to withstand petroleum products, oils as well as most inorganic acids and bases. Green color. These stoppers are sold in packs of 1 pound each; the approximate quantity per pack is listed.