Category Archive: electric Electric Window Opener/Actuator System ACK4 24V White Electric Window Opener/Actuator System ACK4 230 or 24V White Electric Window Opener / Chain Actuators ACK 4/ACK5 230 V & 24 V Models Electric Opening Flat Roof Window Skylight Roof-light Triple Glazed 600mm x600mm Electric Opening Flat Roof Window Skylight Roof-light Triple Glazed 600mmx1800mm Electric Opening Flat Roof Window Skylight Roof-light Triple Glazed 800mmx1800mm Electric Opening Flat Roof Window Skylight Roof-light Triple Glazed 800mmx1500mm Electric Opening Flat Roof Window Skylight Roof-light Triple Glazed 600mmx1500mm Electric Opening Flat Roof Window Skylight Roof-light T / Glazed 1000mm x 2000mm Electric Opening Flat Roof Window Skylight Roof-light Triple Glazed 700mmx1200mm