Tough, flexible rubber construction Fits American Standard single control (Push-Pull), Harcraft, Sayco, Waltec #35 O-Ring (AS568B# 015) 11/16 inch OD x 9/16 inch ID x 1/16 inch wall thickness Designed to withstand harsh chemicals High abrasive resistance and temperature resistance Provides a better seal which helps prevent leaks Intended for faucet repair Will withstand heat between a temperature range of 86°F to 248°F (-30°C to 120°C)