5mm (3/16") Black 5mm Hole Plugs are plastic hole plugs to cover, conceal and decorate 5mm or 3/16" inch diameter holes in cabinets, furniture, window frames, vinyl fences and elsewhere. Fits any 5mm (and 3/16") diameter holes. Hole Plugs work practically anywhere indoors and out. Made from high-impact injection molded plastic. Bulk available.