Package dimensions 11.7 x 10.5 x 3.5 cm; 30 grams. Made of high-quality ceramic, eco-friendly and durable material, wear-resistant and corrosion-resistant, certified by CE and ROHS, suitable for long-term use. The outer shell is made of ABS plastic with good sealing and interior noise dampening technology to reduce vibration generated by the machine. It can be placed in any location for quiet operation. The rotor is made of ceramic; the smooth surface and detachable design make it easy to clean and ensure long-lasting performance. Suitable for aquarium water pumps, air conditioning water pumps, carving machine water pumps, craft water pumps, garden fountains, and other related aquatic product accessories. Easy to use and replace: simply remove the filter head, open the bayonet lock of the rotor cover, remove the defective rotor with axle and bearings, and replace it with a new rotor assembly including bearings.