The pressure gauge has a luminous function and is still visible 80 meters underwater. Made of stainless steel, waterproof and corrosion resistant. The external explosion-proof valve is safer and the explosion-proof index is more accurate.Meets manufacturing standards of diving equipment. Compact portable lightweight, easy to carry. Specification: Bottle Material: Aviation Aluminum Color: Green/Blue/Black/Orange Bottle Size: 32.5x8.5cm Bottle Capacity: 1L Max Pressure: 3000PSI/200BAR/20MPa Underwater Breathing Time: about 15-20min - Full Face Snorkel Mask Feature: 1. Double Air-flow Channels for Easy Breathing, inhaling and exhaling separate channels structure, assure there is enough oxygen stay in the mask and the carbon dioxide would flow out separately, allow you to breathe easily through nose or mouth under the water. Anti-fog & anti leak design. Dry top systems: Dual tube with air valve allows holding your breath longer, breathe dry, would lock air inlet automatically when water entering. Specification: Name: Full Face Snorkel Mask Color: Orange Package Included: 1 x Oxygen Cylinder 1 x Pressure Reducing Valve 1 x Medium Pressure Tube 1 x Diving Respirator 1 x Storage Bag 1 x Full Face Snorkel Mask 1 x Manual. The item "Mini Scuba Diving Equipment Kit 1L Air Oxygen Breath Tank+Full Face Snorkel Mask" is in sale since Tuesday, November 10, 2020. This item is in the category "Sporting Goods\Water Sports\Scuba & Snorkeling\Tanks". The seller is "nuflower2009" and is located in HK. This item can be shipped worldwide.