Round Shaped Water Heater Diaphragms Seal Gasket 75mm Dia 2 Pcs Product Name : Water Heater Diaphragm;Main Material : Rubber Outer Diameter(Each) : 75mm/ 3";Hole Dia : 6mm/ 0.24" Thickness : 4mm/ 0.16";Color : Black Weight : 18g Package Content : 2 x Water Heater Diaphragm