Description: This product is a hair extender and makes an excellent hair extension accessory. It is made of high-quality materials and is safe and environmentally friendly. A bottle of 500 pieces is very practical. They are mounted on the head with a very soft silicone lining for maximum comfort and undetectable. When tightened, it will hold the person's hair tightly and won't slip easily when worn. Functions: Made of high-quality materials, it can be safely applied to the hair without damaging it. A bottle of 500 pieces is very practical. They are mounted on the head with a very soft silicone lining for maximum comfort and undetectable. When tightened, it will hold the person's hair tightly and won't slip easily when worn. There are 5 colors to choose from. A great accessory for hair extensions, easy to wear and take off. Technical data: Item Type: Hair Extensions Material: aluminum silicone Inner Diameter: Approx. 0.3 cm / 0.12 inch Outer Diameter: Approx. 0.5 cm / 0.2 inch Height: approx. 0.3 cm / 0.12 inch Bottle Size: Approx. 3.7 * 6.7cm / 1.5 * 2.6in Color: black Package weight: approx. 58 grams Package includes: 1 x 500pcs hair extension ring 1. 2. The monitor is not calibrated same and the color of the item displayed in the photo may be slightly different from the real object. Please take reality as a standard.