Create a secure seal around roof piping installations with the Water-Tite Multi-Size 3N1 Roof Flashing. Available with a flexible-plastic, hard-plastic, aluminum, copper, or galvanized-steel base, this roof flashing features an elastomer collar and fits any roof pitch to 45 degrees. It has been performance tested for ultraviolet, ozone, and weather resistance and is approved for type "B" (gas) installations. Choose from models that fit 3- and 4-inch vent pipe or 1-1/4-, 1-1/2-, 2-, and 3-inch vent pipe. Water-Tite Multi-Size 3N1 Roof Flashing models are available with a variety of different base sizes to suit your installation needs. Material: Galvanized Steel.