Kalt Plastic Graduate 21 oz - 600 cc Tweet Description The Kalt Plastic Graduate is made of thick clear styrene. This one holds up to 21 oz or 600 cc of liquid. Details Additional Category Tags: Developing & Processing, Developing & Processing Supplies, Graduates Category: Photography Manufacturer Catalog Number: NPGC21 Product Manufacturer: Kalt Subcategory: Darkroom Equipment