Features Continuous Operation: Adopts hard and corrosion resistant titaniumm tungsten material, which can make the pump safe and continuous operation Small Size: Compact overall structure, small size, low noise, significant energy saving effect, convenient maintenance Improve Safety: Automatic protection of pump leakage, electric leakage, overload and over temperature, etc., to improve safety and reliability Excellent Performance: The machine has excellent sealing performance, good sealing performance, stable performance and long service life Easy Installation: Easy to install, this water pump mechanical seals can directly replace the old or damaged Specification: Item Type: Water Pump Mechanical Seals Model: 520-3/4 Material: Silicon Carbide + Tungsten Titaniumm Package List:1 x Mechanical Seals1 x Spring Package List 1 x Mechanical Seals 1 x Spring