For more than 40 years Allstates Rubber & Tool has provided stoppers for industrial, medical and laboratory uses. Our quality stoppers are resilient and can seal any vessel sized from inch to 3 inches. We have 19 different sizes in this range. All of these are available with standard 1 and 2 hole styles. Additionally, we can custom drill odd sized holes for specific sealing applications. If your application calls for a stopper to be assembled around a plug or wire