Check the listing for details. 4 Replacement Hydration Reservoir Bladder Bite Valve Mouthpieces & On Off Valve. Color: Blue, Condition: New with tags. Listed at 8.99 USD. Replacement Hydration Reservoir Bite Mouthpiece with On/Off Valve Condition New Color Blue Brand Hank's Surplus Detailed Description Includes 4 bite valve mouthpieces, 1 on/off valve and 1 O-ring. Will fit most hydration tubes and connections points. To operate the mouthpiece you will need to bite down on it for the hole to open up. Payment Terms eBay Payments International Shipments Customer is required to pay any customs fees for your country. Domestic Shipments Please select from shipping choices will checking out. Returns/Exchanges Returns: If you are unsatisfied with the item please return it to us for refund, less shipping charges to you. We will refund item within 30 days of customer receipt. Item must be returned in condition it was received in (not used or damaged). Please email us for RA# before sending item back. If you have any questions or need any assistance please email us through eBay.