Oatey  Roof flashing 11876 3" ? 4" Galvanized Black 12" x 15" base, No-Calk? Roof Flashings feature color base  to match roof color Self-sealing collar slides over pipe and requires no caulking Metal base for pitch from 0-40 Rated 180F continuous heat and approved for Type B installations Do not use petroleum based products or paint on flashing collar or plastic base Not for hot-mopped or built-up roofs Handles 1-1/2-Inch - 3-Inch and 3-Inch - 4-Inch pipe sizes Matches the color of your roof Available in aluminum or galvanized Available in black, gray, brown or terracotta Do not use petroleum based products on collars