Check the listing for details. Herco Solid Black Rubber Stopper (Size 6-1/2 - 2ea). Condition: New. Listed at 6.00 USD. Herco Solid Black Rubber Stopper Product FeaturesMultipurpose solid black rubber molded stopperStandard size for lab, household and industrial useSmooth tapered sides to fit a range of openingsQuantity offered is shown on listing titleImage is representative - proportions vary with size Rubber Stopper Sizing Size Top Bottom Length Top mm Bottom mm Length mm000*1/25/1613/1612.78.22100*19/3213/3211510250*21/321/2117132513/49/161191425225/325/81201625315/1623/321241825413/412620255*1 1/1629/3212723255.51 7/6431/3212824256*1 1/41 1/3213226256.51 11/321 1/1613427257*1 7/161 3/1613728257.51 1/21 1/813931258*1 5/81 5/1614133258.51 11/161 13/32143362591 3/41 15/3214537259.51 13/161 1/21463825101 31/321 5/8150422510.52 5/641 3/41534525112 13/641 7/8156482511.52 15/3221635025122 1/22 1/81645425132 11/162 9/32168582513.52 31/322 7/161 3/8756235143 1/231 1/29075391543 1/41 1/210383391653 1/221279050