Falcon® 48-well Clear Multiwell Plate is comprised of clear not treated polystyrene. Flat bottom, with low evaporation lid. Individually wrapped, sterile, 50/case. Unique labyrinth lid, condensation rings, and deep-well design control contamination, reduce evaporation, and minimize edge effects. Crystal-grade virgin polystyrene Nonpyrogenic Non-treated polystyrene Convenient, peel-open medical-style packaging for individual product presentation Individual trays are PET (Code 1) and recyclable Working volume of Media is 0.5-0.8 mL Working volume of Trypsin is 0.05-0.08 mL (Your lab protocol may call for another proteolytic enzyme.)