Features 1、The powerhead water pump has 360° automatic uniform rotation, and is exquisite and compact. 2、The powerhead water pump is common to most pipe diameters, and has five variable diameter options. 3、No need to plug in and 0 energy consumption, the fish tank makes waves with advanced technology. 4、Adopting 6 blade wide propeller impeller, using the principle of hydrodynamics. 5、The main water flow of the original tank drives a uniform rotation without power supply. Specifications: Item Type: Powerhead Water Pump Material: PTC Shell Product Size Adapter sleeve with 23mm inner diameter: Suitable for 25mm outer diameter outlet pipes Adapter sleeve with 18 mm inner diameter: Suitable for 20mm outer diameter outlet pipes Adapter sleeve with 16mm inner diameter: Suitable for water pump Adapter sleeve with 13mm inner diameter: Suitable for water pump Package List 1 x Water Pump Automatic Wave Head 4 x Socket