Top quality and Low price and Fast delivery ! We can supply Micro Rings with Screw ,Silicon Micro Rings ---Micro -Links System Products.1)Size:3.00mm ,3.50mm,4.00mm ,4.50mm outside diameter2)Color :dark color middle -color ,light color such as brown black yellow aubrn blond and so on. 3)Packing:250pc/bottle 500pv/ bottle 1000pc/bottle