Oatey Roof flashing 14049 .25" ? 4" Retro Master Flash? 8"x8" base,for profiled roofing material & designed for installations where standard flashing can't be used Retro Master Flashing slides over vent pipe for pitch to 45 degrees Flexible base conforms to most flat or contoured roof surfaces including clay tile and metal roofs Approved for Type B installations Master Boot is made of EPDM and compounded specifically for maximum resistance to weathering due to ozone and ultraviolet light Master Boot is easily customized with a sharp knife or scissors to accommodate a broad range of pipes and vent diameters