Features:The water pump is only suitable for water circulation, not for water pressurization, submersible installation (only for cold water) and completely waterproof.Motor stator and circuit board part of the epoxy resin potting and completely isolated with the rotors to solve the long-term submersible diving water pump problems, can be installed underwater and completely waterproof. The pump adopts high performances ceramics shafts, high precisions, good shock resistance. Built-in DCbrushless motor run smoothly, no electric spark, low noise and long service life.Because the pump adopts the ceramics sleeve and the ceramics shafts precisions cooperation, the noise is lower than 35 decibels, the power smaller even can reach 30 decibels,almost mutes effect.Application: Water circulation system, refrigeration system, solar thermally system, pipe circulation for water heater, water dispenser, floor heating, fountains, etc. Specifications:Material: Plastic+MetalSize: Approx. 9x6cm/3.54x2.36inchVoltage:12VDC Fluid Temperature:0 ~ 110 Usage Time:more than 40,000hours Current: 0.7A Inlets/Outlet: 1/2" male theads.Maximums Flows Rate: 8L/minutes(2.1GPM) Water Head: 3metre/9.8ftMaximums circulating water temperature: 100C/212F. Can't be immersed in 100C/212F hot water Low noise: 30db at 1 metre Note:Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1x Pump 2x Brass Coupler 2x Stainless Steel Clamp