Extension Tips - Black, 100 Tips These are "heat shrink tubes specifically for use with a hair iron" for attaching hair extensions. They are the "heat shrink tube" type that is attached by shrinking the tube with a hair iron. Perfect for those who can't get their hands on tips and aren't using dedicated extensions. Insert your natural hair and the extension through the heat shrink tube, and attach by shrinking the tube with a hair iron. *These are thinner than the conventional product. They are ideal for attaching hair bundles of approximately 1g. ☆ We also sell other extension-related products, so please take a look. #Reasonable Braiding Extensions We also sell items for beauty salons and hair salons. #Reasonable Beauty Salon Gear