ACK4 24V Single Chain Window Opener

ACK4 230v or 24v electric window opener, MAC4 Window Opener, C20 Window Opener, suits skylights, top hung, bottom hung and standard casement windows, adjustable opening from 100 – 400mm, Supermaster heavy duty window opener for windows requiring a large opening, Sintesi electric opener, Quasar, Quasar L,  Vega, VCD and ACI window openers with smaller profiles when space is an issue or the new Eltral KS30/40 Window Opener With Built In Remote Option, Window Master Electric Actuators