Leaky pipe openings damage your roof and interior. This #1 square pipe flashing fits 1/4 to 2 inch OD pipes with a flexible silicone rubber boot that can be cut to size. The square base molds easily to metal roofing rib lines, conforming to corrugated panels. Works well on 10/12 to 12/12 pitch roofs. High-temp silicone rubber performs from -165°F to 446°F. For deep corrugated panels exceeding 1.5 inches, select the next larger size boot for the same pipe. If your roof pitch exceeds 10/12, choose a square base flashing for proper fit. Do not over-tighten screws. Avoid continuous use beyond the temperature range, as the product will not perform properly. Ideal for chimneys, exhaust vents, woodstoves, and pipe openings. Includes 15 roofing screws and a hex bit socket. You get a durable, weathertight seal that keeps your roof protected and leak-free.