The Cressi bottles are built by Faber, the largest producer European of dive tanks, with standards of very high quality. They exist in 5 different volumes: 5,10,12,15 and 18 liters. The valves and fittings are carried out by Cressi-sub. It was the first easily flexible valves and fittings which appeared on the market. Robust and reliable, it is built with materials of very high-quality. At the time of its design, the passages of air were especially studied so as to guarantee maximum services even and more particularly for the regulators having the highest performances. The drawing of the steering wheels ensures a good catch and facilitates the closing and the opening of the bottle. A new and exclusive system of window in the steering wheel makes it possible to check by a simple glance if the tap is in open or closed position. (yellow = closed tap, red = open tap) In the exit of air an insert threaded which makes it possible to use a regulator DIN indifferently or with clamp is built-in. The flexible side of the valves and fittings makes it possible to pass easily from simple to a double exit and vice versa. The Cressi-sub valves and fittings underwent brilliantly the rigorous tests imposed by the European standards and can thus praise prestigious certification EC.