Rough-in set for extended tub thickness to 1 2 (13mm) For extending the rough-in mounting materials of Geberit TurnControl bath waste and overflow drains For use with TurnControl Tubular Brass Rough-ins only For tub wall thicknesses 3 8-1 2 Not suitable with PushControl style Geberit drains Extended Overflow Shaft and Nut Extended Drain ScrewCountry of Origin: US Height: 1 Length: 2 Weight: 1 Width: 1