Features: 1.SAFE AND DURABLE: The shell is made of ABS material, firm and durable, worry free diving, internal ceramic shaft, common to freshwater and seawater, safe fish farming, no risk of electrocution. 2.STRONG AND QUIET: Large flow rate, high head, strong power, low power flow rate does not decay, the sound is quieter, underwater about 35 decibels. 3.LOW NOISE: Four corner buffer base design, further enhance the mute effect, using lower noise. 4.MULTIPLE CALIBERS: 16MM, 20MM, 22MM, 25MM four outer diameter, a variety of water pipe caliber replacement, different calibers to meet most of the water pipe fittings. 5.ADJUSTABLE FLOW: Adjustable flow design, rotate the button to adjust the flow size, dual use, energy saving and power saving. 6.STRONG PUMPING: The lowest water level of the fish tank can be pumped about 5MM or so low water level, better pumping residue at the bottom of the fish tank, to ensure that the water quality is cleaner. Specification: Item Type: Aquarium Filter Pump Material: ABS Use: Fish Tank Fountain Circulating Filter Pump Connector Size: OD 16MM/0.63in, OD 20MM/0.79in, OD 22MM/0.87in, OD 25MM/0.98in PackageList: 1 x WaterPump 5 x Connector 2 x Washers 4 x SuctionCups Note All data are measured manually, and there are certain errors in the measurement results.