Cassettes with separated lid 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: 30x 25 x 5 mm, external dimension:40x 28x 6mm. Internal holes dimension: (0.6 ± 0.2)x (0.6 ± 0.2) 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 Securline 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)