Description: 10PCS glass roll on bottles with black cap. Perfect for essential oils, perfume, fragrance or other liquids. Safe, portable and convenient packaging, reusable and refillable. Mini travel size: approx. 5x1.4cm/1.97x0.55in. Perfect for home, office, massage, travel carrying, retail store bottle, etc. Specification: Specification Capacity: 1/10 ounce / 3ml Materials: Glass bottle, Steel roller ball, plastic cover Quantity: 10pcs Height: 2 inch Width: 0.55 inch Package Includes: 10 Pieces Empty Roll Bottles Note: 1. Before you put the roller on the bottle, roll it around a bit with your finger. It releases and then rolls easily. 2.Take the roll on off again and then replace it back..rub down hard on your wrist and most the times it starts working fine. 3.If it does not work. please replace it with replacement roller balls.