Uxcell 29mm Outer Dia 1mm Thick Rubber Oil Filter Seal Gasket O Rings (20 Piece) Product name : O ring; material : rubber Color : Black; outside diameter : 29Mm/1. 1" Inside diameter : 27Mm/1. 1"; thickness : 1Mm/0. 04" Weight : 3G Package Content : 20 x O rings