A507-05 brush small and flat brush, semi-rigid bristles. purobio cosmetics has created the brush n°05 to easily apply the make-up on small areas of eyes and face. the round and flat bristles allow you to make fine lines, light points and precise details. how to use after use: after use: clean properly the brush with a mild detergent. for fluid products put a small quantity of product on the back of your hand to avoid waste and excess, dip the brush and apply.