Feature 1Practical and can be widely used in diving, underwater production and other fields. 2Strap size can be adjusted, can be bundled with different specifications of gas cylinder, that is very convenient. 3Anti-skid hold design, gas cylinder can be placed more stable and firm. 4It's designed to look like a backpack for easy carrying under water. 5Absolutely a good helper for your diving, swimming, and underwater operations.SpecificationFeatures: Practical and can be widely used in diving, underwater production and other fields. Strap size can be adjusted, can be bundled with different specifications of gas cylinder, that is very convenient. Anti-skid hold design, gas cylinder can be placed more stable and firm. It's designed to look like a backpack for easy carrying under water. Absolutely a good helper for your diving, swimming, and underwater operations. Specification: Brand: Keep Diving Condition: Brand New Material: Nylon, Plastic Color: Black Size: Approx. 36 x 20.5 cm / 14.2 x 8.1 in Weight: Approx. 594 g Package List: 1 * Oxygen Bottle Holder Note: Only the Oxygen Bottle Holder, Oxygen Bottle and others are not included in our list. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.