Product information:Hair material: 100% remy human hairLength: 14inch 16inch 18inch 20inch 22inchLifespan: 6-12 months(depends on your care)Hair weight: 50g, 20 pieces per pack, 2.5g per pieceTape size: 4*0.8cmYou want to know this: 1 pack if you want to add a highlight; You?ll need 2-3 packs for your whole head. If you want a very thick look, we recommend 4 packs. Can be reused. We use high quality Italian white tape which is reusable. It?s strong, invisible, easy to apply and no residue. Can be dyed: Light colors can be dyed to darker colors(like blonde can be dyed to black and brown). But dark colors can?t be dyed to light colors. Can be heated: Good to straighten and curl. Since we use 100% remy human hair, you could style it like your own hair.Note: 1.Make sure your hair is washed and unconditioned before applying.2.Be sure not to put the tape ins too close to your hair root since it may cause uncomfortable to your scalp. 3.Only dye light colors to dark colors. Take one piece to try before you dye all the hair. 4.We recommend to deep condition your tape in hair extensions once per week since there is not nutrition supplied like our natural hair. Hair extensions need to absorb nutrition from hair conditioner. 5.If you find it hard to choose a color, feel free to contact our customer service for help.Return Policy: We are sorry if you find our hair extensions don't meet your needs. Don't worry. We accept return within 30 days. Please contact our customer service if you find anything upset you.