Description: This product is hair extension ring, a great accessory for hair extension. It is made of high quality material, which is safe to your hair and environmental friendly. Comes with 500pcs in one bottle is very practical. With very soft silicone lining, which allows you to install them to the head for maximum comfort to the client and undetectable. It holds human hair very tightly after pinched and it will not easily get slide when wearing. Available in 5 colors, you have more selection. Specification: Condition: 100% Brand New Item Type: Hair Extension Rings Material: Aluminum + Silicone Inner Diameter: Approx. 0.3cm / 0.12inch Outer Diameter: Approx. 0.5cm / 0.2inch Height: Approx. 0.3cm / 0.12inch Bottle Size: Approx. 3.7 * 6.7cm / 1.5 * 2.6inch Color: Black, Dark Brown, Brown, Light Brown, Blonde(Optional) Package Weight: Approx. 58g Package Include: 1 x Bottle Of 500PCS Hair Extension Rings Notes: 1. Please allow 1-2mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Material and Apecifications: Material: anti-slide silicone and light aluminum. Lined beads dimensions: Outer Diameter: 5mm, Inner Diameter: 3mm, Height: 3mm. No Damage and Sliding: No damage to human hair. These micro beads with super soft silicone lined inside, so it is very safe to human hair even it is pinched very tightly. And no sliding from human hair. Evolution in Fashion: Choice of 5 different shade, hair beads for extensions blends perfectly with your natural hair or extension & can be mixed or matched while using party hair tinsel or natural color hair extensions 5 Colors to Choose:These silicone micro links rings come in 5 colors: light brown, dark brown, black, blonde and dark blonde. Depending on the color of your hair, you can choose the closest color. Each Color is about 500pcs Packed in a bottle. Quality Assurance: We are always committed to providing the best products and services to our customers, if you have any questions, please contact us and we will give you a satisfactory answer within 24 hours.