Micro ring will hold stick tip (i-tip) extensions firmly in place until you remove them. They will hold for several months depending on how long you want to keep the extensions. They are made extra lightweight aluminum and covered in an extra coating of plastic to increase durability.
Note: 4mm Micro-Rings are not suitable with the 18 inch 1 gram hair extensions. If you are in need of the micro rings for 1g strands then you need to get the larger i.e. 4.5mm sized micro rings.