Maximum filling pressure is 3000PSI or 200bar, and the gas with oxygen content greater than 40% cannot be filled. Suitable for recreational diving air source with depth of less than 7 meters. Can be used as a backup air source for recreational diving at a depth of 30 meters. The 0.5L oxygen cylinder allows the diver to stay 7 meters underwater for 5-10 minutes, depending on individual lung capacity and depth of diving, perfect for beginners. The item "DEDEPU Mini Scuba Diving 0.5L Tank S3000plus Oxygen Cylinder Camouflage" is in sale since Wednesday, July 8, 2020.This item is in the category "Sporting Goods\Water Sports\Scuba & Snorkeling\Tanks". The seller is "divingg" and is located in Shenzhen/Guangdong. This item can be shipped worldwide.