Culture Tube, Polycarbonate, 13x100mm, 13-415mm Closure.• Optically clear and durable• Flat bottom - ideal for large-scale production of culture media• Wide range of chemical resistance combined with excellent pH controlPolycarbonate, screw thread culture tubes are optically clear, durable, and a safer alternative to glass. They are ideal for production of terminally sterilized products. The tubes are flat bottom for large-scale production of culture media, using automated or manual filling systems. Polycarbonate tubes offer a wide range of chemical resistance as well as excellent strength for repeated use. They also maintain excellent pH control. Leak-proof caps provide security during handling and transportation. They are autoclavable and provided non-sterile in shrink-wrapped trays with screw thread caps packed separately.