Putco 48859 Nylon BOSS Locker Side RailsSpecifications Brand: Putco Part Number: 48859 UPC: 010536995862 Added the largest bed rails around with Putco Nylon Boss locker truck bed rails. These rails are 2. 5 inches around and are 43% larger than most other rails. Constructed out of our NeverRust T 304 stainless steel with black Nylon ends. The rails are polished to look just like your OE chrome and every tie down point can handle 500lbs. Installing these high quality bed rails is simple with