1″ Thickness 17-7 Stainless Steel Flat Bar 1″ x 3.47” x 5.1” Length Similar to 304 but tougher. This is a slightly magnetic stainless. It has 7% nickel and 17% chrome It is corrosion resistant and cuts well. 304 has slightly more nickel and chrome. To know the exact differences search 17-7 stainless steel VS 304 and it will tell you all you need to know.