1): 45 pcs valves or 90 pcs valves in one plastic tray And then packed in cartons. 2): 2 pcs(1 pair) valves in one small plastic bag, 50 pcs or 100 pcs in one big plastic bag, And then packed in cartons. 3): 2pcs in one blister card (+$0.2/pcs) and then packed in cartons.