Description: Hair extensions micro rings have a small interface, invisible, compact, good quality and not easy to break. Silicone lined beads have a flared design, which makes the hook easier to handle when extension hair. The inner silicone of micro link rings can effectively protect the hair from being squeezed by the outer hard metal. Lined rings for hair extensions are available in a variety of colors to meet different hair color needs. Aluminum silicone rings are suitable for 1 gram hair bundle extension. Specification: Material: Aluminum + Silicone. Color: Show as pictures. Size: 5mm * 3mm * 3mm (outer * inner * length). Note: About 500pcs rings, due to manual counting, there might be slight difference in quantity. There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Included: 500 x Hair extension rings. Hair extensions micro rings have a small interface, easy to be invisible, small and good quality, not easy to break Silicone lined beads have a flared design, which makes hooking easier to handle when extension hair The inner layer of micro link rings can effectively protect the hair from being damaged by the outer hard metal extrusion Lined rings for hair extensions are available in a variety of colors to meet the needs of different hair colors Aluminum silicone lined rings are 5mm in size, suitable for 1 gram hair bundle extension