This is the very popular SeaCure Custom Fit Mouthpiece. Features of this super item include: Able to custom fit at your own home The SeaCURE Custom Mouthpiece is a unique, moldable device designed to fit your mouth, teeth, and jaw configuration precisely to provide maximum retention and control of the mouthpiece/regulator unit of you SCUBA equipment. SeaCURE offers custom comfort and eliminates the jaw fatigue sometimes experienced with conventional mouthpieces. Test data are available which indicate a reduction of muscle effort in the range of 33% to 59% depending upon the individual diver. SeaCURE greatly reduces gum abrasion. Molding instructions included with product The general concept is that scissors are used to trim unnecessary material from the unit to fit the size of the specific mouth/jaw. Then boiling water is used to soften the mouthpiece bite wings only, to allow molding to precisely fit the individual's teeth, guns, and jaw. The unit is REMOLDABLE so that if not at first satisfied, or dental work changes the bite, it can be remolded and adjusted to accommodate the changes for comfort. AUTHORIZED DEALER, FULL MANUFACTURER´S WARRANTY!!! Enjoy your Dive or Snorkel experience to its fullest with the SeaCure mouth piece! THE FOLLOWING CHARTS GIVE BEST FIT FOR YOUR TYPE REGULATOR OR SNORKEL GEAR TYPE I: REGULATORS – fits standard orifice regulators that have a conventional mouthpiece retention lip. APOLLO, AQUA LUNG– older metal regulators, ATOMIC, BEUCHAT Evolution, iceberg & Nitrox, VXT8, VXT Octo, VX4, BRIDGESTONE, CRESSI-SUB (except Ellipse uses a Pro II- pull out the yellow insert), DACOR after 1992 (cannot use with Aero), DIVE BUDDY, IST (except Proline is a II), NDS, OCEAN MASTER, PRO SUB, SAEKO-LINE, SAS, SCUBA PRO, SEAC, SHERWOOD (most early models/Brut/Shadow/MagnumII/Oasis/pre 1992 Blizzard), TABATA/TUSA (not TUSA Imprix) TYPE II: REGULATORS - fits intermediate size air orifice regulators. ABYSS Explorer, A