Vent Block with Pre-Cut Head Flashing, Portland Products Group, 9-1/4 in L, 7-1/4 in W
Portland Products Group Vent Block with Pre-Cut Head Flashing, 4-1/4 in ID Dia, 9-1/4 in L, 7-1/4 in W, Suitable for: 4 in Vent Pipes with Hood