2 Pcs Tank Banger Underwater Signal Device Cylinder Diving Tank Accessories for Divers Noise Maker (Black and Green)

Easy to Use: you need to attach the tank banger to your diving gas cylinder, then grab the ball and pull it away from the tank; By tapping the diving tank, you can make a sound and easily attract the attention of your companions. Fine Workmanship: the underwater signal device is mainly made of quality plastic and rubber, which is wear resistant, reliable and serviceable, allowing you to use it with confidence for a long time. Wide Applications: our diving tank accessories can be applied underwater for a long time; By tapping the submersible tank to make a sound, they can get the attention of your mate and others without scaring the fish. Thoughtful and Considerate Design: the strap of the tank banger is stretchy, flexible and elastic, can wrap around the diving gas cylinder well, and it won't fall off easily, offering you a pleasant using experience. Abundant Quantity to Use: you will receive 2 pieces of diving tank accessories; The circumference is about 17.7 inches, can be stretched twice, the outer diameter of the ball is about 1.3 x 1.4 inches, suitable for 12-14L gas cylinders