50 Grams per Bundle, Typically takes 150-250 Grams to Complete a Full Head. I-Tip Hair Extensions are Needed for Microlink Installs Also Known as the Strand by Strand Method (Microlinks with itips). *If Using This Texture With a Service 16” is Included, if You Want a Longer Length for a Service be Sure to Select Enough Bundles to Complete a Full Head