Aluminium Underwater Scuba Noise Maker
This is an aluminum underwater noise maker, another alternative to tank bangers. Get someones attention by just shaking this 'rattle'.
Contains two ball bearings that make a distinctive noise when shaken.
Comes in anodized finish with a barrel lock lanyard. Measures approx 1/2 x 7 inches (2cm in diameter, 18cm long) - fits easily in a pocket.