4x Replacement Bite Valve Cover for Hydration Pack, Leak-Proof Bite Valve, Easy to Install for Water Bottle Description: Silicone Material: Made of food-grade silicone and PP, this product is safe and ensures your drinking water is healthy. Soft and Bite-Resistant: The material is soft and elastic, resistant to biting and tearing, extending the life of your water bottle. Leak-Proof Design: The interface between the bite valve and the water bottle features a leak-proof design to effectively prevent leaks from improper use. Easy to Install: Installation is simple and convenient without the need for tools, making it easy to replace the bite valve. Enjoyable Drinking Experience: Regularly replacing the bite valve keeps your water bottle hygienic, protects your drinking water, and provides a refreshing drinking experience. Size Chart: 1.8cm x 2.7cm / 0.71in x 1.06in Package Includes: 4-Bite Valve Replacement Note: Please allow for slight errors of 1-2cm due to manual measurement. Seller Warranty: 0 days Dear Customer: When purchasing products from this store, you can enjoy the following privileges: 1. Free international shipping (if the goods meet the free shipping standard of the sale price). 2. Sufficient stock, welcome to place an order. 3. Free return: You can return within 30 days of the date of receipt of the goods. 4. Your order will arrive at its destination within 10-15 days. 5. If you still haven't received the product, please contact us to find a solution. We will handle it as soon as possible. Due to the time difference, we may not be able to reply immediately, please wait patiently. We wish you a nice day and happy shopping.