... the hair more tighten. Most customer choose Micro Ring with Silicon. And it will make the ... hair more tighten. Micro Ring with silicon * Professional hair ring for hair piece * Material: Aluminium or ... ring with screw * Color: 1#,3#,5#,6#,7#,8#,9#,10#,11#,12#,13#,14#,15# Packing: 100pcs/bottle ... , 1440bottles/ctn Micro ring with silicon 100PCS packing