Feature 1It is a professional diving bite mouthpiece, made of premium quality Silicone, safe to use. 2Durable and comfortable to use, won't affect your breathe. 3Suitable for scuba diving. 4Disposable, you can throw it after using, do not need to store it. 5Nice gift for your family, friends, colleague and yourself.SpecificationFeatures: It is a professional diving bite mouthpiece, made of premium quality Silicone, safe to use. Durable and comfortable to use, won't affect your breathe. Suitable for scuba diving. Disposable, you can throw it after using, do not need to store it. Nice gift for your family, friends, colleague and yourself. Specifications: Material: Silicone Optional Color: Transparent, Black Size: Approx.5.5 x 5 x 3.5cm/2.17 x 1.97 x 1.38in Weight: Approx. 15g Package List: 1 x Silicone Bite Mouthpiece .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Note:Due to manual measurement, please allow 0.5-1cm error.