Silicone Tapered Plug Thermos Stopper 3.445 x 3.655 x 1.00 Each

Plugs Are Designed With a Hole in The Middle to Allow For Insertion into a Part That Normally Would Experience Pressure and Pop-Outs. They Are Designed To Work With A Choice of Three Sizes of Silicone Stems Which Can Be Inserted From Either Side of The Plug and Then Removed to Release Pressure, Such As When Painting Mugs, Thermoses, and Cups.

More Sizes Are Available As Special Order.