Revotec's innovative engineering team has developed this simple unit using this latest technology, components and assembly methods to products a robust reliable unit that will not obstruct water flow. Made in the UK, Each unit is Non-Leaking, Incredibly easy to install, operate and overcomes all the problems associated with any capillary action and clip on devices. Each system is supplied with a replay and all necessary fittings. Suitable for use with all Electronic Radiator Cooling Fans and is available in a range of fitting to suit most applications. Electronic Fan Controller 35mm Positive Earth Part Number: EFC35PE Positive Earth Housing. Fits directly in to a radiator top or bottom hose for direct water contact. Technical Information: Supply Voltage: 12v Space in hose approx: 35mm Overal length approx: 65mm Material: Aluminium Relay Rating: 30 AMPS Wire Length: 700mm Supplied With: 2 x Hose Clamps, Relay, Cap, 3 x Cable Ties, Fitting Instructions