Complete Compatibility: Specifically designed for bottles in sizes 19, 24, 32, and 40 ounces ensures a . Superior Materials: Constructed using high-grade silicone for the stoppers and robust plastic for the buttons, this set prioritizes health with -free materials. Tested durability ensures prolonged use and reliability, maintaining the integrity of your beverage container. Practical and Essential: Perfectly prevents leaks with precisely fitting silicone stoppers and responsive buttons. This kit ensures your bottle maintains its convenience and usability, making it essential for daily hydration needs. Note: The physical slightly color difference or difference, does not affect the use of Colour:Black Material:Silicone+Plastics Package Contents: 2x replacement buttons 2x additional springs 1x screwdriver 2x Stopper Replacement 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.