Feature: 1. FUNCTION: Used to make sound when diving, so as to attract the attention of the dive partner and indicate the direction or object to the dive partner. 2. ALUMINUM ALLOY MANUFACTURING: Made of sturdy aluminum alloy material. It has excellent durability, can withstand the test of diving environment, not easy to corrode, to ensure a long service life. 3. ANTI SLIP TEXTURE: Well made, the surface is designed with a diamond shaped anti slip texture, which not only provides good anti slip performance, but also increases its aesthetics and feel. 4. BUILD IN STEEL BALL: The underwater shaker also contains steel balls inside, which can not only strike the gas cylinder to make a sound, but also make a crisp sound by shaking. 5. EASY TO CARRY: The underwater shaker comes with a 360° rotating hook. Divers can hang it on the BCD or other diving equipment, easy to carry and use. Specification: Item Type: Underwater Shaker Material: Aluminum Weight: Approx. 65g / 2.3oz. Package List: 1 x Underwater Shaker