Amerimax W Valley 18 in x 10 ft Galvanized Steel Sheet Flashing Plastic Edging Vapor Retardant Compatible Install Surface Color:Black (Textured Finish) Vapor Retardant Compatible Install Surface Concrete Q: Can the shelf be adjusted Series Name W Valley Package Quantity 1 Gauge 29 Color Finish Family Silver Manufacturer Color Finish Unpainted galvanized Warranty None For Use with Windows No Material Galvanized steel For Use with Doors No For Use with Roofs Yes For Use with Skylights No CA Residents: Prop 65 Warning(s) No For Use with Decks No Width (Inches) 18 For Use with Pipes No Length (Feet) 10 For Use with Chimneys No For Use with Vents No For Use with Gutters No For Use with Egress Windows No W valley features wide wings that extend far under shingles to provide a waterproof trough at steep roof junctions Provides protection against moisture damage where 2 roof elevations are joined Hemmed edges provide additional strength and protection against sharp edges Galvanized to inhibit rust and corrosion Made in the USA