Complete Compatibility: Specifically designed for Owala FreeSip bottles in sizes 19, 24, 32, and 40 oz. ensures an ideal fit. Superior Materials: Constructed using high-grade silicone for the stoppers and robust plastic for the buttons, this set prioritizes health with BPA-free materials. Tested durability ensures lengthy use and reliability, keeping the integrity of your beverage container. Practical and Essential: Perfectly prevents leaks with precisely fitting silicone stoppers and responsive buttons. This equipment guarantees your Owala FreeSip bottle maintains its comfort and usability, making it principal for on daily foundation hydration needs. Note: The physical slightly shade contrast or difference, doesn't impression the use of Colour:Black Material:Silicone+Plastics Package Contents: 2x substitute buttons 2x additional springs 1x screwdriver 2x Stopper Replacement Only the above kit content, other item aren't included. Note: Light reflection and diverse reveals may cause the color of the article in the picture barely varied from the real thing. The size allowed error is +/- 1-3cm.