1、Large capacity diving oxygen cylinder, portable, constant pressure breathing, stable and lasting. 2、The breathing mouthpiece is made of quality silicone material, safe, odorless, durable. Ergonomic design, easy to bite and breath. 3、The breathing cylinder made of quality material, coating process surface, high pressure gas storage, durable, seawater corrosion resistance. 4、The top decompression valve can be easily released by pressing it with a moderate pressure. 5、3 different colors for you to choose, meet your different needs. Condition: 100% Brand New Item Type: Scuba Diving Equipment Diving Oxygen Cylinder Material: 6061 aviation aluminum + copper Optional Color: green, black, orange Weight: Approx. 2950g Product specification: 1L Medium pressure tube length: Approx. 69cm/27.2in Primary valve size: Approx. 9.7x6.5x5.4 cm/3.8x2.6x2.1in Secondary valve size: Approx. 11.5x10.5x7cm/4.5x4.1x2.8in Top decompression valve size: Approx. 3.5cm/1.4in Maximum pressure: 3000PSI/200BAR/2OMPA Available time: about 15 ~ 20 minutes Three inflation methods: 1. High-pressure pump: portable, spare 2. Scuba adapter: large vial guide vial 3. Electric pump: easy to pump Suitable for people: Professional diving (spare air source), fishermen, novice divers, diving amateurs, firefighters, lifeguards, etc. 1 x Diving Oxygen Cylinder 1 x Primary reducing valve 1 x Secondary breathing valve 1 x Medium pressure tube 2 x Sealing ring 1 x Instruction