1、Made of 6061 aviation aluminum standard, the cylinder has passed strict testing and conforms to diving standards. 2、Food grade silicone material mouthpiece, safety assured. 3、Press the top to remove the gas in the bottle (note: the pressure shall not exceed 30000psi or 200ba). 4、Surface treatment: hard oxidation and spraying, seawater corrosion resistance of more than 500 hours. 5、Number of breaths: approximately 170 breaths calculated at 0.5 LLTERS per breath. Condition: 100% Brand New Item Type: Oxygen Tank Material: 6061 aviation aluminum, T_S3000 single gauge breathing head Color: black, white, fluorescent green, orange (optional) Capacity: 0.5L Weight: approx. 1kg Length: approx. 35cm/13.8inch Diameter: approx. 59mm/2.3inch Air capacity: 20MPa(compressed air) Maximum pressure: 3000SI/200BAR/20MPA Number of breaths: about 170 times, calculated by 0.5 LLTERS per breath: more than 10 minutes (deep sea within 10 meters) Surface treatment: hard oxidation and spraying, seawater corrosion resistance of more than 500 hours Duration of use in different water layers: 1-3 meters, about 8-10 minutes 3-7 meters, about 6-8 minutes 7-10 meters, about 5-6 minutes 1 x Oxygen Tank 1 x Breathing Adapter 1 x Oxygen Tank Storage Bag 1 x Strap 1 x Manual 1 x Scuba Adapter 1 x Accessories Bag 1 x Thread Bushing