Pipe Flashing Master Flashing #1 Retrofit Round Base, Pipe Range 3/4" to 2-3/4" (19.05mm - 69.85mm) Simple, wrap-around solution to flashing a penetration through a metal roof. Comes with a stainless steel clamp/Gripper instead of many small rivets s marked with dimensions to allow for easy sizing to fit each individual application Easy to Install, installed in 5 minutes. Resistance to ultraviolet rays, cracking & weathering.