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 bladders, including Packs Hydraulics models. Premium Silicone: Made from high-quality silicone, offering durability, elasticity, and resistance to odors. Free from harmful substances, providing a soft bite for easy and healthy drinking. 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: Light reflection and differences in display screens may cause slight variations in color. Measurement may vary by +/- 1-3 cm.