A very fine brush designed for applying liquid or cake eyeliner.
An extremely fine lining brush which might be better suited to a professional make-up artist doing extremely fine or detailed work.
If you need any advice on which make-up brush would suit your needs best then ask professional make-up artist of thirteen years, Antonia Krieger for some guidance on your purchases.
Alternatively why not have a make-up bag revamp and treat yourself to a professional make-up lesson. You will receive expert advice on products and learn valuable tips of the trade. For further information on this service click the "ask the seller a question" link above.
Wash with hair shampoo and condition. Do not leave brush in warm water as it will loosen the glue and the hair will come away from the handle. Don't scrub this brush just pull the shampoo gently through the hairs so none of the hairs splay out.