Full Technical Description: Corner Type; ASTM A1011/A36/A575/A576/A635/B633 SS Grade 33 Steel Material; 3-1/2 Inch Length X 4-1/8 Inch Height Size; Electrogalvanized Finish; 1-5/8 Inch Channel Width; UL, CSA Applicable Standard; 1/4 Inch Thickness; Hot Rolled Pickled and Oiled Process; 0.780 Pound Weight; 4 Hole(S); 9/16 Inch Diameter (Hole) Hole/Slot Size; 2 Side(S); Hole Spacing Size 13/16 Inch (From End), 1-7/8 Inch (on Center)