Laing D5 high-performance water pump motor with manual speed control via adjustable knob.This product is compatible with any EK-D5 pump top and pump reservoir combo unit.This pump is ideal for PC and other electronics water cooling. The D5 pump is equipped with an electronically commutated spherical motor. In a pump with a spherical motor the only moving part is a spherically shaped rotor which in this pump is held in place by a bearing ball made of ultra-hard and wear-resistant ceramic.Rated 50.000 hrs MTBF at 25C ambient!Adjustable speed in five steps:- Step 1: 1800 rpm- Step 2: 2550 rpm- Step 3: 3300 rpm- Step 4: 4050 rpm- Step 5: 4800 rpmSpecifications:- Motor: Electronically commuted spherical motor- Rated voltage: 12V DC- Power consumption: 23W- Permitted voltage range: 8-24V DC- Maximum pressure head: up to 3.9m- Maximum flow: up to 1500L/h- Maximum liquid temperature: 60C- Materials: Stainless steel, PPS-GF40, EPDM O-rings, Aluminium oxide, hard coal- Power connector: 4-Pin Molex- and 3-Pin FAN connector