Heavy 11 gauge galvanized steel that is slotted for vertical adjustment. Non slip dimples for secure hold. 3.5″ wine angle bracket pivots for angled ot flat mouting of 2″ x 6″ bunk or bolster boards. Complete with nut and bolt or angl bracket. Mounts with 1/2″ bolt.SizeAssembledBulk Packaging*Aftermarket Packaging8″9″11360-1-10″11″11361-1-