Connecting the two tubes to your vehicle water (Antifreeze/coolant) tank. 2. Supply power. Then it will work. Specification: About 6.5 meters / second. ABS Thickeningbody case ( Strong! ) 32 pass 4way allcoppercoil Duct hole is 50mm (1.97 inch) ( We have 50mm duct hose for sale )...