Materials: •Stationary Ring:Ceramic •Rotary Ring:Carbon •Secondary Seal:Nitrile Rubber(NBR) •Spring:Stainless metal Fit for Shaft Diameter:8/10/12/14/15/16mm Opreating Temperature: -20°C~+100°C Opreating Pressure: ≤0 Speed: ≤5m/s Application:Clean water pump,circulation pump,and general industrial pump