Oatey No-Caulk 1-1/4 In. to 1-1/2 In. Thermoplastic Base Pipe Flashing is designed with a one-piece construction that prevents the collar from coming off, ensuring a secure and lasting fit. It features a patented positive double seal that s a leak- fit around the vent stack, making it an excellent choice for protecting your roof. The black color blends seamlessly with modern roofing materials while ing superior weather resistance. This No-Caulk collar allows for expansion and movement of the pipe without compromising the seal, accommodating roof angles from flat to 45 degrees. Compatible with a variety of pipe materials including copper, cast iron, plastic, aluminum, and galvanized pipes, it is easy to install by simply slipping over the vent stack where it automatically adjusts to pipe size and roof angle. Resistant to rust, corrosion, and roof discoloration, this flashing provides durable, reliable protection for vent pipes on roofs. Model Number: 11898