Product description from manufacturer’s website:Oatey® Rain Collar For No-Calk® Roof Flashings can be used as a secondary seal for commercial and residential applications that require a watertight seal for roof penetrations around the plumbing vent pipe. Self-sealing collar slides over pipe and requires no caulking. Oatey products have earned the trust of plumbing professionals for over 100 years. Features:Use as a protective water shield (slides down over pipe)Rated 180°F continuous heat and approved for Type B installationsNo caulking neededDo not use petroleum based products on rubber collarsNon-fading collar materialNot for hot-mopped or built-up roofs Specifications:Pipe Diameter: 3 in.Material: RubberBrand: OateyProduct Type: No CalkColor: Black Unopened box containing 24 parts. Item is unused surplus. Product/Box may have shelf wear. Product does not carry manufacturers warranty. We make every effort to take quality pictures of each item from a variety of angles. Please inspect the pictures carefully so you know what you are buying and contact us with any questions. Thank you.