Description These replacement roller tops are designed to fit essential oil bottles with a 16mm neck. They provide a smooth and even application of your favorite essential oils or perfumes. The rollers are made from practical materials, ensuring durability and a long-lasting performance. great for those who want to refresh their old bottles or create custom blends. Features -Color:Multi -Material:Jade -Size:2.00X1.10X1.10cm/0.79X0.43X0.43in -Convenient to use: designed for essential oil bottles, these roller tops are easy to assemble, saving you time and effort -Even application: the roller ball design ensures an even application, enhancing the effectiveness of your essential oils and making the fragrance last longer -Durable and practical: made from durable materials, these roller tops are resistant to tear and wear, ensuring longlasting use -Versatile usage: suitable for various settings such as home, office, and spa, these roller tops meet different needs and preferences -Elegant design: with a simple and elegant appearance, these roller tops enhance the aesthetic appeal of your essential oil bottles, adding a touch of qualityPackage list: 9pcs x essential oil bottle head