Description:100% brand new and high quality Special design mouthpiece to reduce jaw fatigue and increases comfort.Fits your bite pattern exactly.Regulator/snorkel can hang in your mouth without biting down the mouthpiece tabs.It can be applied for deep-diving , free diving equipment, fits most standard regulators.If there are a little loose, you can use the given tie belt to tie, prevent water leakage.Can be easy and repeatedly to shape.Specifications:Material: TPESize (L x W): Approx. 7x5x2.5cmColor: Blue, Black, White, Pink.Suitable: For adults.Quantity: 1 Pc.Instruction:Just dip the mouthpiece in hot water using the supplied handle, then briefly cool and place into your mouth in the proper orientation. Bite down softly for a good fit of your bite pattern.Package includes: 1pc x Scuba Diving Mouthpiece (with Tie Wrap)Notes:Transition: 1cm=10mm=0.39inch1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 2. Please allow 1-3cm measuring deviation due to manual measurement.