1.Environmental protection PVC pipe body,non-toxic and odorless,safe to use. 2. The tube buckle side is provided with anti-skid treatment,can effectively prevent the breathing tube from falling off. 3. A water inlet valve is arranged in front of the pipe to prevent water entering into the pipe. 4. Silicone glasses strap,soft and comfortable to wear,good elasticity. 5. Breathing mouthpiece adopts food grade silicone material,sanitation and healthy. Suitable for swimming,snorkeling,diving. Condition: Item Type:Front Breathing Tube Weight:. 175g Colour:black Material:Silica gel Package Contents: 1 x Front Breathing Tube 1 x Breathing Tube Buckle Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.