Long service time - the hair extension lasting time depends on the growth speed of your own hair, in general, the hair extension beads can last for several months; eventually, the micro rings will have to be removed or moved up towards the scalp again. Practical & invisible - non slip soft silicone lining can be applied to the hair safe, bring with you comfortable experience and and imperceptible, the micro link rings can wrap the hair tightly, won't fall down easily. Hair protect design - double design hair extension beads with aluminium outside and micro-silicone inside, the soft silicone inside can protect your natural hair and great to fix the hair extensions in proper place. Appropriate size - the dimension of the silicone link ring beads is outer diameter 5mm, inner diameter 3mm, length 3mm (Warm note: small accessories, please keep away from your baby children). Large quantity - come with 2500 pcs micro ring beads in 5 colors, black, blonde, brown, dark blonde, dark brown micro rings are available, 500 pcs for each color and each color micro rings are bottled individually, you can pick the appropriate color according to your hair extension color.