These are the common aluminum 80 tanks. They are NOT the old 6351-T6 alloy and are fully serviceable. Tanks have an October 2025 Hydrostatic Test and VIP date. They are nitrox clean and valves have just been rebuilt. These are yoke only valves. Can install new pro-valves for additional charge. In shop pickup only. First come, first choice of remaining tanks. Will come filled with hyper pure air.