Roof Vent Pipe Boot Base Shape Round Base Material Aluminum Cap/Collar Material EPDM Material Thickness 0.3 in For Roof Angle 36 Degrees For Number of Pipes 1 For Maximum Pipe Size 1 7/8 in For Minimum Pipe Size 1/8 in Base Height Not Applicable Base Width Not Applicable Base Diameter 4 3/4 in Seal Material Silicone Top Opening Closed Application Pipe Vents Product Type Universal Master Flash UV Protected Yes For Roof Type Pitched Standards UPC