Mechanical Seal Part No. MG1/50-Z Required for Water Pump of Quench Unit. Dimensions: D1 = 50mm, D3 = 71mm, L1 = 30.5mm For Shaft Dia = 50mm. Rubber type = NBR, Material of metal part = SS 304 Stationery and Rotating Face material = SiC / SiC, Operat