ZINC ELECTROPLATED FINISH; 120 LB VERTICAL, 30 LB TRANSVERSE, 30 LB LONGITUDINAL LOAD RATING; CHANNEL MOUNTING TYPE; ASTM A570 33 LOW CARBON STEEL CLAMP MATERIAL; B-LINE. BRAND; WEIGHT 8 LB PER 100 PIECES; HARDWARE SIZE 1/4 INCH-20 TPI