Spread those peels and treatment products around evenly. This 8" brush is made from boar hair, aluminum, and wood and is sturdy enough to handle a variety of applications.- great for glycolic, lactic, and TCA peels- mask and serum application- 8" long and 1.75" wide. Bristle length 1.25"DirectionsRinse brush and sterilize (alcohol, UV sterilizer) prior to use. Dip brush into treatment item and wipe off excess. Rinse well and let dry after treatment/peel is applied.