Scuba Diving Shaker with Detachable Magnet & O Rings Kits 5 Sizes Storage

Scuba Diving Shaker with Detachable Magnet Noise Maker Safety Tank Rattle Stick Signal Bell Underwater Communication Device with O Rings Kits 5 Sizes and 90° Hook Storage. Specification: Material: Lightweight aluminum alloy Dimension: 16.8cm/6.6in x 2cm/0.78in Package Include: shaker stick x 1, magnet x 1, tool x 1, O-ring x 5, hook x 1 113 decibel The scuba diving underwater noise maker can make maximum 113 decibels by shaking. Loud enough to attract your diving buddy's attention underwater over 30 feet away. Detachable Magnet It is up to you to install the magnet or not if you worry about magnet affects compass navigation. Install the magnet when you need to keep quiet. The package includes a magnet and an installation tool. O-Ring Kits Storage 5 sizes nitrile rubber O ring kits and 304 stainless steel 90° hook stored inside. Replace the unexpected broken O rings on different scuba regulators in emergency  Notice: The magnet is not necessary accessory to install, the