CoBra Marine Premier Product manufactured from Marine Quality Heat Treated 304 Stainless Steel, with the ULTIMATE in strength at a material tensile strength of 125,000 lbs / square inch. Material thickness is .104 (less than 1/8 inch). Corrosion resistance is SUPERIOR. Finishes available are 2B Satin Polished or powder coated black. Weight per unit is 5 lbs, mounts with 3 bolts, nuts, washer on each side for The Edge Pro & The Voyager Pro, and 2 on each side for The Angler Pro & CoBra STV/HPS Pro.