Designed for convenience and durability, these 16-tooth transparent roller balls are ideal for DIY enthusiasts who create their own essential oil blends. Simply insert the roller ball into the bottle's neck, and you're on your favorite oils. The clear PE plastic construction ensures that your oils remain uncontaminated and easy to apply. Features -Color:Transparent -Material:Steel, Plastic -Size:2.10X1.00X1.00cm/0.83X0.39X0.39in -Convenient size: the compact design of these roller ball bottles makes them easy to carry in your bag or pocket, ensuring you can use them anytime, anywhere -Multipurpose: these bottles are Suit for storing and applying essential oils, lip oils, perfumes, and other liquids, offering great versatility -Smooth application: the 16tooth transparent roller ball provides a smooth and even application, enhancing the overall user experience -Durable material: constructed from pe plastic, these roller ball bottles are durable, and safe for various liquids -Versatile usage: suitable for a range of settings including home, travel, and office, these bottles are designed to meet diverse needs Package list: 120 x roller bottles