Specification - C1100-XR - Floor Cleanout with Heavy Duty Round Adjustable Cover and Plug MIFAB C1100-XR Series adjustable floor cleanout with laquered cast iron body and anchor flange, secondary "O" ring Test Seal, 4in diameter cleanout opening and round heavy duty ductile iron scoriated combined cover and plug top assembly with stainless steel vandal proof allan key screws and primary gasket seal. (For membrane floors add Suffix -C for the membrane clamp).