35 foot long premium central vacuum direct connect hose 1-3/8 inch diameter Hose is made of premium crushproof material which will outlast other lightweight hoses Variable suction control ring to reduce suction when vacuuming small rugs 35' direct connect hose is compatible for many Vacuum Systems Works for all Beam Central Vacuum systems prior to 2008 Q models, BM1393. This dual-voltage hose has a two-prong direct-connect type wall connector which requires 110v Power Valves plus two small contacts inside the 1.5" diameter hole in order to power your vacuum's power nozzle. Power head AND system On/Off switching is done conveniently at the handle.