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 You’re Getting a Service & Want to Include This Texture Select One-16” Bundle if Using 16” Hair Extensions for an Install, if You Are Upgrading to a Longer Length With This Texture for a Service be Sure to Select Enough Bundles to Complete a Full Head (A Full Head Typically Takes 150-250 Grams).