Roof Vent Pipe Boot Base Shape Square Base Material Plastic Cap/Collar Material EPDM Material Thickness Not Applicable For Roof Angle 45 Degrees For Number of Pipes 1 For Maximum Pipe Size 8 1/4 in For Minimum Pipe Size 4 in Base Height 11 in Base Width 11 in Base Diameter Not Applicable Seal Material Silicone Top Opening Open Application Pipe Vents Product Type Master UV Protected Yes For Roof Type Pitched Standards IAPMO (UPC) Maximum Ambient Temperature 275 Degrees F