Roof Vent Pipe Boot Base Shape Square Base Material Aluminum Cap/Collar Material EPDM Material Thickness 0.3 in For Roof Angle 21 Degrees 45 Degrees For Number of Pipes 1 For Maximum Pipe Size 19 1/8 in For Minimum Pipe Size 0 in Base Height 24 3/4 in Base Width 24 3/4 in Base Diameter Not Applicable Seal Material Silicone Top Opening Closed Application Pipe Vents Product Type Multi-Flash Square Vent UV Protected Yes For Roof Type Pitched Standards UPC