Stainless steel ultra T-bolt clamp. Clamps are individually tagged with the UT number and Apache part number/UPC code. Band and saddle: 3/4" wide 304 stainless steel (saddle provides 360 deg. sealing surface). T-Bolt and nut: 304 stainless steelbolt with 7/16" zinc-plated nut to prevent corrosion and seizsing on stainless steel bolt (nut includes nylon longing insert). 4 spot welds on each end of clamp for extra strength (clamps rated 75.0 lb. applied torque). Each clamp is stamped with the minimum/maximum size range.