DANCO Mobile Home Male Closet Flange, Black, 7-Inch x 3-1/4-Inch, 1-Pack (41974) Constructed of a strong and durable plastic, meaning it was built for longevity. This product has a 7-inch flange diameter and a 3-1/4-inch thread diameter. The closet flange is approved for mobile homes and RV's. This product is designed to secure the toilet to the floor and connect the drain pipe. You must secure this product to the floor for optimal performance. Durable plastic construction 7 in. flange diameter 3-1/4 in. thread diameter For mobile homes