Uxcell 12mm Diameter Single Coil Spring Water Pump Mechanical Shaft Seal Product name : water pump seal; internal diameter : 12Mm External diameter : 24Mm; overall size : 21 x 35Mm/0. 83" x 1. 4"(Hd) Material : ceramic, rubber, metal; color : Black, white, Silver tone Weight : 16G Package Content : 1 x water pump seal