6 [ Windows, namely, sliding windows, awning windows, rotating windows, fixed pane windows, casement windows, single hung windows, double hung windows, hopper windows and ] louvre windows of metal composed primarily of metal window gallery members, window frame members, coupling pieces for connection to other window frames, mullion members, weather-strips, security bars and screens, fly screens, and louvre blades; powered windows of metal and automated windows of metal, window frames of metal, [ roof windows of metal, skylights of metal including tubular skylights and powered or automated skylights, metal roof, wall and floor vents for heating, cooling or ventilation, and metallic parts ] and fittings in this class for all of the aforementioned goods, namely, louvre channel members, clips, bearings, handles, links, rivets, operating bars, sensors, and flashings [ ; ladders of metal including loft ladders ]