Each strand has approx 180 individual hairs that are bonded together on the ends by a keratin protein glue shape of Nail shape hair that is melted by a fusion iron or fusion iron or fusion heat wand which connected to individual section of your hair. Since these are 100% human hair , you can wash, dry and style just like your own hair. You may also curl, flat ironed or even color that hair. It can take anywhere from 150-250 strands for a full head of hair depending on how thick your own hair is. They last approx 3-4 months with good care before they need to take out or redo again. Quantity: 25 Strands ( 1 g Per Strand) Glue Tip: Keratin U Tipped (Nail Shape) Texture & Length: Straight 22 inches long Hair Type: Remy Human Hair UPC 741435944780 Color # New Fuchsia Pink Hair Type Straight Brand Name Hair De Ville Unit Count 25.00 Count Item Weight 1 Pounds Manufacturer mega made inc Material Type Human Hair Product Style Long Straight Hair Extension Length 22 Inches Installation Type Fusion Material Features Natural