GAF TigerPaw 48 in x 250 ft Polypropylene Roof Underlayment Hardened Steel Nails The Hydro Crunch 315 Watt CMH Item Weight:.625 The Hydro Crunch 315 Watt CMH Conversion Kit allows you to convert any existing light reflector with a standard mogul socket to use with a 315W Ceramic Metal Halide lamp (two prong base) with our socket adapter and 315W CMH ballast The graceful high arc silhouette pairs beautifully with classic or modern cabinetry trusted data indicates 250 ft variant exists Width 48 in Warranty Limited lifetime For Use with Asphalt Shingles Yes For Use with Metal Roofing Yes For Use with Wood Shakes Yes For Use with Flat Roofing No UV Resistance Up to 180 days exposure Color Light gray Frequently Asked Questions (FAQ): A: Designed for asphalt shingle systems and may also be used with slate