These amber glass vials are perfect for a variety of applications such as health & beauty, fragrance, and essential oils. Made with Type III glass, the amber color is produced directly inside of the glass - making it ideal to house essential oils, which can cause painted glass to chip or peel. Amber glass provides UV filtering properties perfect for protecting light-sensitive materials. Stainless steel roller balls offer a high end alternative to plastic. Metal roller balls provide a cooling, massaging effect when applied to the skin and maximize penetration of ingredients. Vials come complete with stainless steel roller ball, PP plastic housing and black PP screw top cap. Roller ball housing features a pedestal for the roller ball to rest on. This design allows the roller ball to depress slightly as the cap is torqued down.