The modified Hiraoka Staining Kit stains up to 20 grids at a time. This modified kit features Hiraoka Staining Kit an autoclavable and microwavable the staining tray and staining tray insert. The modified plate holder as well as the parafilm well holder are made from Delrin, while the staining tray and staining tray insert are made from polypropylene. Includes Hiraoka Staining Tray (6), Plate Holder, Parafilm Well Holder, Space Insert (2), Grid Support Plate (2), Parafilm.