Oatey 11958 Roof flashing 3" ? 4" Galvanized All-Flash? 18"x18" base, No-Calk? Roof Flashings can be used in commercial & residential applications Patented All-Flash? design allows use on multiple pipe sizes Galvanized base Rated 180F continuous heat and approved for Type B installations Metal base for pitch from 0-40 Self-sealing collar slides over pipe and requires no caulking Slides over pipe. Type of base determines pitch Non-fading, non-cracking and non-rusting bases and sealing collars Ring on collar tears off, allowing flashings to seal different pipe diameters Approved for Type B installations Not for hot-mopped or built-up roofs