and high quality: High Wear-resistant and durability. : The tank refill adapter is made of high quality material, which is anti-rust and durable. EASY TO USE: Simple to operate, making diving become easy, no need to carry scuba. Small size and lightweight, easy to carry and use. PORTABLE&PRACTICAL: Portable and practical, it is accessory for diving. Used for filling small oxygen cylinder with oxygen from the scuba. HIGH QUALITY: Adopt high quality material, and meet the manufacturing standards of diving equipment. weight:270g Gauge pressure: 5000psi luminous gauge colour:Black Material:Aluminum alloy size:Length: 137mm Package Contents: 1 x adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.