Bundles sold individually. 98-102 Grams 2-3 Donors per Bundle Double Weft Luster: Low - Medium Can be Straightened - Recommended Maximum Heat: 430°F Dyed to Soft Black (Shades May Vary) Processing Time Prior to Shipping: 1-5 Business Days These extensions have been previously colored. If you're looking for extensions to be lightened, we recommend the extensions in our Luxe, Gray, or Limited Collections. The longer the length of the hair, the shorter the weft, so more bundles may be needed when using longer lengths Bundles needed for a minimum leaveout out sew in install* : 12” - 14”: 2-3 bundles 16” - 24”: 3 bundles 26” - 28”: 3-4 bundles *The number of bundles needed varies based on your desired density preference, style, and head size.