ITW Stainless Steel Roll Jacketing is manufactured from T-304 and T-316 prime grade Stainless Steels. Stainless Steel is available in smooth, stucco embossed, or 3/16″ corrugated roll jacketing, and deep corrugated sheets. Jacketing is recommended for insulated piping, tanks, and vessels less than 8 feet in diameter. Deep corrugated sheets are recommended for diameters greater than 8 feet.