Oatey 11931 Roof flashing 3" ? 4" All-Flash? High-Rise? 13"x20" base,patented design that allows use on multiple pipe sizes in commercial & residential applications Roof Flashing slides over DWV pipe for pitch to 60 degrees All-Flash collar has tear-away ring allowing flashing to seal various pipe diameters Non-fading, non-cracking rigid black thermoplastic base Non-fading sealing collar Approved for Type B installations