Roof Vent Pipe Boot Base Shape Round Base Material Aluminum Cap/Collar Material EPDM Material Thickness 0.3 in For Roof Angle 22 Degrees 45 Degrees For Number of Pipes 1 For Maximum Pipe Size 20 in For Minimum Pipe Size 9 in Base Height Not Applicable Base Width Not Applicable Base Diameter 25 1/4 in Seal Material Silicone Top Opening Open Application Pipe Vents Product Type Universal Master Flash UV Protected Yes For Roof Type Pitched Standards UPC