Experience the ease of applying essential oils with these replacement roller tops. Designed for 16mm neck bottles, they offer a smooth and controlled application, ensuring you get the of your oils. The durable construction means they can handle daily use without wear and tear. great for anyone looking to enhance their aromatherapy routine. Features -Color:Multi -Material:Jade -Size:2.00X1.10X1.10cm/0.79X0.43X0.43in -Quick assembly: designed for essential oil bottles, these roller tops are easy to assemble, saving you time and effort -Even distribution: the roller ball design ensures even distribution of essential oils, enhancing their effectiveness and making last longer -Durable and practical: made from durable, practical materials, these roller tops are built to last, ensuring longterm use -Multiuse: suitable for various settings such as home, office, and spa, these roller tops meet different needs and preferences -Sleek design: with a simple and elegant appearance, these roller tops enhance the aesthetic appeal of your essential oil bottles, adding a touch of sophistication Package list: 9pcs x essential oil bottle head