The system has two components: a square staining jar and a 12-position vertical slide rack. Made of resistant acetal plastic, the staining jar will not break like most glass jars do. It will resist most staining agents, including alcohol and xylene (but not phenol, iodine or ferric chloride). The wide stable base offers greater stability, while the inside is recessed, allowing for a smaller reagent volume of only 80 mL. Easy to clean and no metals to corrode. Ideal for special stains, frozen sections and special processes.