2.5'' Corrugated Metal Roofing Sheet Medium Ribs Corrugated Roof Roll Forming Machine 2.5″ Corrugated is the medium height corrugated sheet – and our most popular. With the strength needed to excel on both roof and wall applications, 2.5″ Corrugated takes on coastal, rugged, and contemporary applications with ease. Profile Specification No. Item Description 1 Coil Galvalume, Galvanized, PPGI, Aluminum 2 Raw Material Thickness 20-30 GA 3 Working Speed 20-30 m/min ( not