Manufactured from clear, virgin polystyrene and selected for optical clarity and consistency. Plates are available with flat-, round-, conical-, V-, and C-bottom well styles. C-bottom plates feature a flat bottom for optical measurement, but the hard corners are curved to eliminate liquid traps and improve plate washing. The chimney-well design option reduces the risk of cross-contamination and facilitates sealing by cap mat, thermal sealer, or adhesive sealer. All plates are free of detectable RNase, DNase, human DNA, and pyrogens.