The model number of this hair product is STK Remy- 23 and the raw materials is come from Myanmar lady hair . We have so many size in Human Remy Hair . Firstly we clean human hair with comb after that watch and clean with detergent and other hair watching liquid to avoid from dirty and other insects. We produce our product (Remy Human Hair) made and check step by step. So all of our products are best quality and suitable price. If you want to know more details, you can ask by chat box.