GAF M-Curb 12 in. L x 2 in. W Polyester Straight Black Asphaltic Roofing Flashing Cover for Roof Penetrations (8 pcs per bx)

M-Weld curb straight is used with M-Curb Kits to enlarge the flashing area. This will allow for the flashing of larger roofing penetrations. Now you can have the confidence of a solid seal even when dealing with these larger penetrations.