20 Door closers, not of metal, non-electric; non-electric door closers (non-metallic); non-electric door closers of non-metallic materials; non-electric, non-metallic closers for doors; cylinder locks made of non-metallic materials; locks (other than electric), not of metal; locks, not of metal, other than electric; non-metallic, non-electric mechanisms for locking doors; non-metallic, non-electric mechanisms for locking windows; safety locks (non-metallic, non-electric); latches, not of metal; sash window pulls, not of metal; ring pulls, not of metal; blind pulls of non-metallic materials; screws, not of metal; furniture