• Material: plastic resin, colour black, resistant to ageing. • 5 ports for connection to extractor ducts, nominal diameter 80 mm; • 1 port for connection to exhaust duct, nominal diameter 125 mm • 2 speed AC motor with shaft turning in ball bearings, coupled to a centrifugal impeller. • Equipped as standard with 2 x Ø80 mm spigot incorporating flow regulators rated 30 m3/h, and 2 plugs. (option of additional regulators).