This auction is for a LOT of Staedtler Mars Dynagragh Pro-Film Pencil Leads. There is 1 unit each of 200 50-N1, 200 50-N3, 200 50-N4 and 200 50-N5. Each unit contains 12 pre-pointed pencil leads for writing on film. All of these are NOS and have been stored for many years in a cool dry closet.