Grey Silicone Round Base Pipe Flashing Master Flash #1, Pipe Range 1/4 Simple solution to flashing a penetration through a metal roof. Is marked with dimensions to allow for easy sizing to fit each individual application. Resistance to ultraviolet rays, cracking & weathering. Comes labeled with its corresponding diameter. Up to 45 degree pitch. Available in 10 various colors of EPDM or orange silicone for extreme temperatures.