Description: Material: This face roller is made volcanic stone and aluminum alloy shell, which can be used on a finished face and wont mess up your makeup. Functions: Instantly absorb excess oil face, making the less greasy and clean. Portable: in your handbag at dating, travel, , home, etc. Multifunction: With 4 replaceable balls, massages and mattifies face, mattifying face roller is suitable for oily and prone skin. Washable and Reusable: the volcanic be cleaned with warm water, and reused again after overnight, durable and portable. Specification: Product Size: Ball: 4.5cmx2.6cm/1.77inchx1.02inch Box: 4.5cmx3cmx3cm/1.77inchx1.18inchx1.18in Material: Stainless Steel volcanic stone Package Includes: 1 Volcanic Roller 4 Replaceable Balls Note: Please allow slightly errors due to manual measurement and different monitors.