Stainless Steel Door and Frame system, - the best in Architectural quality stainless openings offering the designer significant aesthetic creative opportunities in commercial, institutional, or high style architectural environments. Doors: Available with 18 gage, 16 gage or 14 gage face skins Styrene Core (Standard) Honeycomb Core (Optional) Polyurethane Core (Optional) Vertically Steel Stiffened Core (Optional)