Comes with 4 bite valve silicone sleeves, each containing an inner post. Bite Valve Replacement Sleeves: Replace old and leaking bite valves on your hydration bladder; compatible with most types of water bags, including Packs Hydraulics water bladders. Premium Silicone: Made of high-quality silicone, offering excellent durability and elasticity, odorless and free of harmful substances, providing a soft bite for easy sipping and healthy hydration. Wide Application: Fits most hydration bladders of various capacities; ideal replacement for cycling, running, hiking, and other outdoor activities. Color: Transparent-Red Material: Silicone Package Contents: 1 set * Soft water bottle spout Only the above package content is included; other items are not part of the package. Note: Due to light reflection and differences in display screens, the color in the image may slightly vary from the actual product. Measurement may vary by +/- 1-3 cm.