Cassettes for the embedding of histological samples to use with the suitable metal cover. The cover is reusable. Cassettes external dimension: 40 x 28 x 6 mm. The sample’s identification is possible thanks to the wizen surface on three cassette's side. These surfaces are fitted to the writing with pencil. For a permanent marking, we suggest to use permanent marking pen Securlme marker II Bio-Optica (code 11-51) or Histology pen (code 11-50). These cassettes are compatibles with Bio-Optica filing system (Istobloc, Colorteca and big archives)