VEVOR Mini Scuba Tank, 1.9L Portable Small Diving Tank for Underwater Breathing, Reusable Lung Diving Cylinder up to 35 Minutes Dive Time, Emergency Rescue Pony Bottle with Backpack for SnorkelingLong-Lasting Breathing SupportHigh-Pressure ResistanceSmooth & ReliableEasy Refilling & ReusableTravel-Friendly & PortableLuminous Pressure GaugeTank Wall Thickness: 0.3 in / 7.4 mm,Tank Thread: M18 x 1.5,Medium Pressure Hose Length: 33.5 in / 850 mm,Tank Capacity: 0.5 Gal / 1.9 L,Tank Mouthpiece Material: Silicone,Maximum Diving Depth: 32.8 ft / 10 m,Item Model Number: S700PLUS-2,Product Weight: 9.3 lbs / 4.2 kg,Maximum Tank Filling Pressure: 20 MPa,Tank Diameter x Height (Tank Only): Φ4.4 x 13.6 in / Φ111.5 x 345 mm,Tank Refill Port Size: 0.3 in / 8 mm Male Connector,Tank Material: Aluminum