Features:Made of high quality bearing, smooth rotation, long lifespan.Low noise, corrosion resistant, wear-resistant, sanitary.PPS material parts, high hardness, not easy to deform, no leaking.Big contact can pass through big current, perfect conductivity.Suitable for use in water pump, welding gun cooling, water drill adding water, cleaning, spraying, etc.Specification:Material: Engineering plastic Power: 45W(max)Working pressure: 4.5kgMax. pressure: 0.75MpaFlow: 4L/min(max)Suction head: 1meterDischarge head: 45meterSize: Approx. 17*9.8*6cm / 6.7*3.8*2.3inchPump large thread outer diameter: Approx. M18*1.5 (outer diameter 18mm)Pump small thread diameter: Approx. 10.5mm(outer) / 6.5MM(inner)Blue ring inner diameter: Approx.12.2mmWeight: 683gPackage Included:1 x Diaphragm PumpNote:When using this pump, please match the power supply.Inlet should use filters(not included). Thanks for your understanding.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..