MicroRings for application of Zen Hair I-Tips.  Tube rings 200pcs /tub. Silicone Lined rings 100pcs/tub.  Precision laser-cut rings with powder paint coating for durablilty. Outer dimensions 4.2mm (h) by 3.5mm (w). Recommend Silicone lined rings for clients with fine hair, to cushion the compression effects on the hair for the most comfortable fit.