Additional Details ------------------------------ Product description: Sioux Chief 886 series TKO closet flanges shall be used where necessary in drainage systems. Flange shall have a full-swivel, corrosion-proof stainless steel ring, with sufficient holes for securing to floor and slots for inserting closet bolts. Flange shall have a knockout, sized larger than the opening, which comes out in one piece preventing it from falling down the drain line. Flange shall have a 3" Sch. 40 spigot connection which conforms to ASTM D2665 (PVC) or D2661 (ABS). Flange shall hold a standard head test and be UPC listed. Always fasten closet flanges to the floor. Features: Patent #5,377,361 Proven performance, improved design Knockout will not break apart and cannot fall down drain pipe Corrosion-resistant 430 stainless steel swivel ring is engineered for maximum strength Holds five floors (22 PSI) for head test Note: Image may not be actual representation of item.