Trident Tank Banger to Get the Attention of Your Fellow Dive

This is the Trident Tank Banger to Get the Attention of Your Fellow Diver Features: A must have to help ensure a safe and fun dive Slotted unbreakable oval ball Bright colors makes it easy to find on your tank Get the attention of your buddy, student, or other divers from long or short distances Fits most scuba tanks Model #TA20 A great safety device that NO diver should be without!