Safeguard delicate tissue specimens during processing, embedding, and long-term archiving with Marketlab Bulk Cassettes with Attached Lid. Precision-molded from high-density, solvent-resistant acetal polymer, these tissue cassettes feature fine 1mm flow-through pores that optimize reagent exchange while keeping small biopsy fragments securely contained. Supplied with factory-attached snap lids that lock firmly in place, they streamline histology lab setup and eliminate lid assembly steps prior to specimen loading.