Cellmaster? polystyrene roller bottles from Greiner Bio-One are tissue culture treated for optimal cell growth. Each bottle has graduations up to 2000 ml, a writing surface, and is printed with the lot number. Bottles with 850 cm2 of growth area measure 12.2 cm W x 27.1 cm H. Non-pyrogenic to <0.06 EU/ml; irradiated for sterility. DNase, RNase free.