Oatey aluminum No-Calk Roof Flashings with rustproof stamped aluminum base are designed for use in commercial and residential applications that require a watertight seal for roof penetrations around the plumbing vent pipe. Brand Name: Oatey Sub Brand: No-Calk Width: 12 in. Length: 15 in. Material: Aluminum Product Type: Flashing Color: Silver Flashing Type: Roof Number in Package: 1 pk Shape: Rectangle Fits: Fits 4 vent pipe Height: 4 in.