1-1/2″ Deep Rib (6″ oc, 1-1/4″ Peak, 3-1/2″ Valley) 1-1/2″ Deep Rib (6″ oc, 1-1/4″ Peak, 3-1/2″ Valley) July 14, 2022 1-1/2″ Deep Rib (6″ oc, 1-1/4″ Peak, 3-1/2″ Valley)