Made of high quality ceramic, eco-friendly and durable material, wear-resistant and corrosion-resistant, certified by CE, ROHS, for long-term use. The outer shell is made of ABS plastic with good sealing and a new inner noise damping technology to reduce vibration generated by the machine.It can be placed on any place for quiet operation.The product rotor is made of ceramic material, smooth surface and detachable design facilitate cleaning, ensure longer durability. Suitable for Aquarium water pump, air conditioning water pump, carving machines water pump, crafts water pump, garden fountains, and other relevant aquatic product accessories.Easy to To use and replace, simply remove the filter head, open the bayonet lock of the rotor cover, take out the defective rotor with axle and bearings and replace it with a spare rotor with new bearings.