Highly polished 316G stainless steel.Heavy-duty use.Other Details: Part No. Description Length(mm) Width(mm) Height(mm) HoleCentres(mm) MountScrews(mm) 29176HD Open Base Stainless Steel Cleat 200 65 50 83 x 45 6 c/s 29177HD Open Base Stainless Steel Cleat 255 70 60 96 x 47 7 c/s