Materials:Stationary Ring:CeramicRotary Ring:CarbonSecondary Seal:NBRSpring:Stainless steelFit for Shaft Diameter:12/15/18/20/25mmOpreating Temperature: -20°C~+100°COpreating Pressure: ≤0.6MPa Speed: ≤5m/s Application:Clean water pump,In-line pump and total commercial pumpPackage includes:1pc