Tip Toe 1-1/2 in. NPSM Coarse Thread Integrated Overflow Bath Drain • 1-1/2 in. NPSM mushroom tip toe bath tub drain with integrated overflow • Coarse thread drain shoe • 1-1/2 in. NPSM (1-7/8 in. - 11-1/2 UNC) exterior • European style round full cover mushroom cap • Push down cap to close and restrict draining water • For use in bath tubs with integrated overflow channels cast into the tub shell during the bath tub manufacturing process • Heavy duty metal construction with adjustable plastic tip toe cartridge • Do not use plumber"s putty for installation