1、The top decompression valve can be easily released by pressing it with a moderate pressure. 2、360 degree rotation breathing, unrestrained, constant pressure breathing, stable, large capacity, long-lasting breathing. 3、The breathing cylinder made of quality aviation aluminum material, coating process surface, high pressure gas storage, durable, seawater corrosion resistance. 4、The breathing mouthpiece is made of quality silicone material, safe, odorless, durable. Ergonomic design, easy to bite and breath. 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:  aviation aluminum Optional Color: green, black, orange Weight: Approx. 3220g Product specification: 1L Medium pressure tube length: Approx. 69cm/27.2in Primary Valve size: Approx. 9.5x7.8x3.5cm/3.7x3.1x1.4in 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 bottle 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 Haversack 1 x Diving goggles 1 x Handbag 1 x Primary valve 1 x Secondary valve 1 x Medium pressure tube 2 x Sealing ring 1 x Instruction