Scuba Diving Oxygen Cylinder Equipment. If item is defective after 3 months, you can still send it back to us.The item "Diving Oxygen Cylinder Air Tank Mini 1L Equipment Underwater Breathing Pump Set" is in sale since Monday, September 14, 2020. This item is in the category "Sporting Goods\Water Sports\Scuba & Snorkeling\Buoyancy Compensators". The seller is "za-fashionjewelry" and is located in China. This item can be shipped worldwide.