Description 3 "I" style cross sections are required per Bus, all 50-79. Sold eachWe are proud to offer the complete line of Heavy-Duty OE Quality âORANGEâ replacement sheet Metal. These HD metal repair panels are much thicker and better formed then the cheaper sheet metal available from Brazil and Denmark. Cip1.com is one of only 2 direct imports of this high quality replacement sheet metal. If price is your main concern, we do offer the cheaper / thinner versions. Click here to view all of our Heavy-Duty OE Quality âORANGEâ replacement sheet Metal.