Usage Tips:Premium Silicone Bite Valve Replacement: Crafted from high-quality silicone, these bite valve sheaths offer exceptional durability and elasticity. Free from odors and harmful substances, they ensure a soft bite for easy sipping and healthier hydration during your outdoor activities. Comprehensive Set: Each package includes six silicone bite valve sheaths, complete with an inner post. This ample quantity allows for regular replacement, helping you maintain optimal functionality of your hydration system over time. Effortless Installation: Replacing your bite valve is a breeze with these sheaths. Simply detach the old valve and insert the one into your hydration pack's drinking tube-no modifications needed. Enjoy a hassle-free setup to continue your adventures. Universal Fit for Hydration Systems: Designed to fit a wide range of hydration bladders and reservoirs, these silicone nozzles are compatible with most brands and types, including 360-degree rotatable and on/off bite valves. Ideal for biking, running, hiking, and more. Enhanced Outdoor Hydration Experience: Ensure a reliable and comfortable drinking experience on any adventure. Whether you're cycling, jogging, or exploring the great outdoors, these bite valve replacements are the perfect upgrade to your hydration pack. Colour:Blue & Red & Black Material:Silicone Package Contents: 6 * silicone bite valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.