and high quality: High Wear-resistant and excellent durability. EASY TO USE: Simple to operate, making diving become easy, no need to carry scuba. Small size and , easy to carry and use. PORTABLE&PRACTICAL: Portable and practical, it is essential 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. Colour:Black Material:aluminum alloy Package Contents: 1 x adapter Only the above package content, other products are not included. Note: Light reflection 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.