Amerimax Home Products 20 in. x 50 ft. Galvanized Steel Roll Valley Flashing Model 70020 for sale. brand new. Versatile flashing for use with most waterproofing projects. Heavy-gauge galvanized steelmetal for durability and protection. Bends easily for custom flashing, drip edges, and pre-bent shapes. Dimensions 20 in. x 50 ft. x .010 in. D. Asking 50. Serious inquiries only please.