Feature: 1. SAFE AND DURABLE: Fish tank submersible pump is made of ABS shell, solid and durable, diving without worry, internal ceramic shaft, freshwater seawater universal, safe fish farming, no risk of electric shock. 2. FEATURES: Aquarium circulating filter pump has a large flow rate, high head, strong power, low power flow rate without attenuation, the sound is relatively quiet, underwater about 35 decibels. 3. ADJUSTABLE FLOW RATE: Aquarium small water pump is designed with a four corner cushion base to further enhance the quiet effect and lower noise in use. Rotate the button to adjust the flow size, dual use, energy saving and power saving. 4. MULTIPLE HOSE CALIBER: Mini submersible water pump adopts real power, refuses to false labeling, multiple water pipe calibers can be replaced at will, and different calibers can meet most of the plumbing fittings. 5. POWERFUL PUMPING: Fish tank water level can be pumped at a minimum of about 5mm / 0.2in or so low water level, better suction of the bottom of the fish tank debris, to ensure that the water quality is cleaner. Specification: Item Type: Fish Tank Submersible Pump Material: ABS Use: Fish Tank Fountain Circulation Filter Pump Interface Size: OD: Approx. 16mm / 0.63in, OD: Approx. 20mm / 0.79in, OD: Approx. 22mm / 0.87in, OD: Approx. 25mm / 0.98in. Package List: 1 x Fish Tank Submersible Pump4 x Connector4 x Suction Cup1 x Washers Note: Please allow some error due to manual measurement.