High clarity, 100% virgin polystyrene. Flat bottom & without surface treatment. Clear lot number for batch tractability. Peel-to-open, individually wrapped & sterilized by gamma irradiation. Markings of well coordinates available for 12, 24, 48 and 96 well plates.Non-Pyrogenic, DNase/RNase FREE. Use Alkali Scientific Flat-Bottom Plates, Treated for a variety of cell culture applications including suspension cell growth. These sterile plates have a clear, untreated, hydrophobic polystyrene surface, and are ready for use in an aseptic environment. These plates are RNase/DNase free and non-pyrogenic, and the included lid is non-reversible