Do it no-seep No. 1 toilet bowl gasket with brass bolts. Wax and flange design. Polyethylene sleeve for strong seal. 5/16" x 2-1/4" brass bolt kit. Fits 3" and 4" waste lines. For floor closet bowls only. Meets Federal Specification TT-P-1536A. Tightly seals in gas, odor, and water. Boxed.