Can be used in commercial and residential applications where a watertight seal for roof penetrations around the plumbing vent pipe is required. Slides over DWV pipe for pitch to 40 degrees. Rated 180 degrees Fahrenheit continuous heat. Made of rust-proof, stamped 24 gauge galvanized steel. Non-fading sealing collar. Approved for Type B installations. Not for hot-mopped or built-up roofs. Do not use paint or petroleum based products on rubber collars.