Comes with 4 bite valve silicone sleeves, each containing an inner post. Bite Valve Replacement Sleeves: Replace old or leaking bite valves on your hydration bladder. Compatible with most hydration bladder brands, including Hydraulics packs. Premium Silicone: Made from high-quality silicone, offering durability, elasticity, and resistance to odors. Free from harmful substances, providing a soft and safe drinking experience. Wide Application: Fits most hydration bladders of various capacities. Ideal for cycling, running, hiking, and other outdoor activities. Color: Transparent-Red Material: Silicone Package Contents: 1 set * Soft water bottle spout Note: This package includes only the items listed. Other accessories are not included. Note: Actual color may vary slightly due to lighting and screen display differences. Size may vary by ±1-3 cm due to manual measurement.