25 Grams per Bundle, Typically takes 150-250 Grams to Complete a Full Head. Keratin Fusion Bonds or K-Tips are Needed for K-Tip or Fusion Installs. This Type of Install is When Individual Strands of Hair Extensions (1 gram per extension) are Installed by Using a Keratin Bond. Keratin Bonds Can Be Customized in Size to Fit Each Individual’s Needs Which Creates a Very Discreet, Natural Looking Install. *If Adding This Texture as an Add-On for a Service Select 1-16” Bundle or if Upgrading Length for a Service Select Enough Bundles to Complete a Full Head (150-250 Grams).