.From the Manufacturer

Unlike other styles of bath drains, the Geberit Bath Waste and Overflow (BWO) critical working parts are outside the waterway and away from the flow of water to prevent clogging. The high quality cable is crafted from Teflon coated stainless steel and has a plastic sleeve to deliver years of trouble-free service. Sophisticated style becomes more than a state of mind with Geberit's Euro TurnControl BWO. Like our other BWO products, the Euro TurnControl BWO features Geberit's unique cabling system that keeps the critical working parts outside the waterway, making clogs a thing of the past. This model is designed to fit most tubs 12-16-Inch deep that have a wall thickness of 1/16 - 5/16-Inch. It fits 2-Inch (52 mm) diameter drain hole openings and 2 to 2.5-Inch diameter overflow hole openings. This is the rough-in body only (without trim). It is for use with Euro or Traditional TurnControl trim kits. This product features a stainless steel strainer. This product is also cUPC listed and complies with ASME A112.18.2/CSA B125.2.
.17-Inch Teflon coated stainless steel cable
.For manual rotary TurnControl actuation
.1-1/2-Inch ABS schedule 40
.Installation tools included
.Fastening material included

Geberit 151.502.00.1 12-16-Inch Tub Depth TurnControl Cable-Operated Bath Waste and Overflow Bathtub Drain