Our stainless steel roller ball inserts for 16-tooth essential oil bottles are the good accessory for anyone looking to enhance their aromatherapy routine. These inserts provide a smooth and controlled application, ensuring that you get the of your essential oils. Simply insert the roller ball into your bottle, and enjoy a mess-free and efficient way to apply your favorite blends. Features -Color:Multi -Material:Pp,stainless steel -Size:2.10X1.20X1.20cm/0.83X0.47X0.47in -Versatile usage: suitable for various settings such as home, office, and spa, these roller ball inserts are good for different environments and can be reused multiple times. -Even oil distribution: the roller glides smoothly and dispenses oil evenly, allowing for better control of the oil amount at the top, ensuring . -Easy to install: simply take a roller and insert it into the bottle neck, push it flat into the bottle, screw the cap on, and tighten. installation is complete. -Leakproof feature: the essential oil roller can snap into the essential oil bottle, preventing leaks and allowing for easy removal and reuse as needed. -Transformative inserts: our roller top inserts can instantly convert your spray oil bottle into a rollon applicator, ideal for thicker oils, diluted oils, or rolling oils Package list: 5 pcs x 20pcs essential oil bottle roller ball