... contains 1000 aluminium long tube micro rings. Size: 6mm x 3mm Hair Extension Tools/SILICON Micro RingMicro Ring,Micro Link,Extension TubeAluminium ... or without screw,Silicone Micro ring2)Function:Protect the hair ,prevent the hair sliding from the rings.Popular at present3)Color: ... exported quality standardBest quality,competative prices and fast delivery! Hair Extension Tools/Silicon Micro Ring