Material Type: 7/8" Corrugated Metal Roofing and Siding. Rib Distance (Pitch): 2.67" Pitch. Rib Height: 7/8". Available Gauges: 20, 22, 24, 26. Fasteners: Exposed. Panel Length: 1' to 52'. Roof Slope: 3/12. Installation Can be installed over an open purlin system or a solid substrate. Use bead mastic on the overlap if used for a roofing