Pre bonded hair is also called as keratin tipped hair extenions or stick hair. It is made by 100% handwork. The ingredient of glue is mainly keratin. A bonding glue is attached to the tip of the extension hair and is applied at the root of the individuals hair by using a fusion heat connector . Pre bonded hair extensions / keratin tipped hair extensions / stick hair extensions can easily be removed with a remover. We use 100% remy human hair or cuticle virgin hair to produce pre-bonded hair. It is amazingly silky and smooth and tangle free. Specifications are as follows: 1. We have U shape / Nail shape, V shape, I shape / Stick shape and Flat shape for your option. 2. We have Keratins from different origins for your option, say keratins from Canada, Switzerland, Italy and China etc. 3. Hair length: 14-28 inch, and the most popular lengths are from 18-22 inch. 4. Unit weight: 0.5g/strand, 0.7g/strand, 0.8g/strand and 1g/strand. The weight of strand can be adjusted according to your request. 5. Packing: 100strands/pack, and the package of strand can be adjusted according to customers request. 6. Color available: we have more than 20 conventional colors, and can also dye more colors according to customer's color rings. 7. MOQ: 3Kilos for same length same color, for new customers trial order, we can accept smaller quantity.