... : 6mm x 3mm Hair Extension Tools/SILICON Micro RingMicro Ring,Micro Link,Extension TubeAluminium micro ring with good quality which be sell hot ... in European market. 1)Materials:Cooper Micro ring,Aluminum Micro ring with screw or without screw,Silicone Micro ring2)Function ... at present3)Color:available(You could see the color ring for the micro ring)4)Size:3.00mm,3.50mm,4.00mm ...