[GOOD MATERIAL] Made of high quality Aluminum Alloy Material,Aluminum alloy rod with great hardness is sturdy and durable, difficult to deform. [USED]Used for knocking at some available objects to make a noise to draw diving company's attention. You can use the stick to point out interesting subsea creatures to your buddy, or show them the direction. [EQUIPPED WITH LANYARD]A strong wrist strap with draw string cord lock for adjustment to the best comfort. [EASY TO USE]Presetted scale ,you can do some simple measurement under the water easily. Delivery Quantity: 1pc, Package Contents: Only the above package contents, excluding other products. Size: length 340mm, wire diameter 8mm, scale 15cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color: royal blue (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)