Cassettes for histological embedding of biopsies and small sample. Each cassette has a double closure system to guarantee a perfect lock-up during the processing passage. Internal dimension: 30 x 25 x 5 mm, external dimension: 40 x 28 x 6 mm. Internal holes: (0.6 ± 0.2) x (0.6 ± 0.2) 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)