4mm Extension Beads Black Silicone Lined Micro Ring Beads for Hair Extensions, Pack of 500

["4mm Silicone-Lined Micro Ring Beads for Hair Extensions. One pack contains 500 black beads.","These high-quality silicone micro ring beads feature an inner lining to protect natural hair, making them ideal for strong hair extensions.","Perfect for thin hair, they add length and volume while being easier to hide than 5mm beads.","Suitable for stick/I-tip, feather, and micro ring hair extensions, these 4mm micro rings are compatible only with I-tip hair strands weighing less than 1 gram."]