Don&';t be left on the beach with a missing or broken O-Ring with this must have replacement kit! Features include: Trident Standard kit (20 O-Rings) Mini set (10 O-Rings) Contains various size rubber o-rings in a plastic case For your tank valve, hp and lp air hoses A necessity for your next dive adventure Model #DA78 and #D601 AUTHORIZED DEALER, FULL MANUFACTURER'S WARRANTY!!! Don&';t be left out on your next dive, this is a great o-ring kit from Trident!!!