heres the deal, im looking to get away from the skinny long 10lb bottles and stay with the newer short fat bottles, so thats what im looking for, bottle must still be in cert. and have a high flow valve. bottle paint doesnt have to be perfect. now the 2 bottles i have are like i said the skinny long ones, 1 of them is still in cert., both have highflow valves, the un certified bottle does not have a siphon tube but beside that the valve is good. oh both bottles are NOS brand.