uxcell Rubber Round Tube Inserts End Blanking Caps 30mm Dia 30 Pcs Black Product Mame : Round Tube Insert;Top Diameter : 30mm /1.2" Bottom Diameter : 28mm / 1.1";Total Height : 28mm / 1.1" Material : Rubber;Color : Black Net Weight : 241g Package Content : 30 x RoundTube Inserts