J-117LSBL Yazaki Elector Plastic Joint Black, 2 Pieces (For Mounting Plates and Wall Surfaces) Erector Pipe [J117LSBL Yazaki Yasaki] *Please glue it with the sun arrow adhesive fluid (EY-30, EY-50, EY-100, EY-205). Please use round wood screw diameter 0.1 inch (3.1 mm). Do not use on rails.