Features Excellent materials: the mechanical seal is made of titanium tungsten material, which has high hardness and corrosion resistance, exquisite workmanship, smooth and delicate appearance, durability and durability. Sealing ring and spring: the sealing ring and spring are used together to make the pump run safely and continuously, with stable performance and strong practicality. Compact structure: the circulating water pump with mechanical seal has a compact overall structure, a small volume, low noise, a good energy saving effect, 100% new and high quality, reliable and safe quality. Good protection: the pump is automatically protected against water leakage, current leakage, overload and overtemperature with good reliability. I believe it can bring comfort to your life. SPARE PARTS The mechanical seal of the pipeline circulation pump can directly replace the old or damaged parts, perfectly replace the old or broken parts, with a variety of functions and obvious effects. Specification: Item Type: Mechanical Seal Model: 520-5/8. Material: Silicon Carbide + Ti Tungsten Package list: 2 x sealing rings, 1 x spring Package List 2 x Sealing Rings 1 x Spring