These roller ball head are a great addition to any essential oil collection. They fit standard 10ml bottles and provide a smooth, even application of oils. The practical materials ensure they are durable and , making them great for everyday use. Whether you're a professional or a hobbyist, these rollers will meet your needs. Features -Color:Multi -Material:Jade -Size:2.00X1.10X1.10cm/0.79X0.43X0.43in -Simple installation: these roller tops are designed for essential oil bottles, making installation quick and easy -Smooth application: the roller ball applicator provides a smooth and even application, maximizing the benefits of your essential oils - use: constructed from durable, practical materials, these roller tops are designed for longterm use -Adaptable usage: ideal for various environments such as homes, offices, and spas, these roller tops are versatile and practical -Elegant look: featuring a sleek and minimalist design, these roller tops enhance the visual appeal of your essential oil bottles, making them look more refined Package list: 3 pcs x 9pcs x essential oil bottle head