This is a box of 12 new Elder & Jenks artist brushes fitch flat. The brushes are 1 x 5/8 x 2 1/4. These brushes are US Navy surplus. The box that the brushes come in says fitch which is one kind of brush hair. Looking this brush up by nsn number says the brushes are hog hair. We don't know how to tell what kind of brush hair these are made of, so if you have questions or need more pics please contact us, and we will do our best to get the info you need.