SPECIFICATIONS GALVANIZED DRIP EDGE #15539 HT Gauge Galvanized Steel · 10 ft. Lengths Zinc coated as specified by: ASTM-A-653, Federal Specification AA-S-775 E 1 ¼ in. 3.175 cm 1 ½ in. 3.81 cm Drip Edge 7/16 in. ( 1.