Features: Experience the convenience of hydration with the bites valves. Made of high-quality silicones, these bites valves have an ergonomic design. They are designed to fit seamlessly with hydration packs. Perfect for outdoor sports enthusiasts of all ages, from adventurers to hikers. These rubber mouthpieces for hydration packs ensure that you stay hydrated effortlessly. Specifications: Material: Silicones Color: As the picture shows Package weight: about 20g Styles for choice: 2 styles are available as shown in the picture. Size: about 13cm5.12inch (More size information, please see the picture.) Note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to differences between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 pc bites valve