Designed for preparation of serial dilutions in quantitative microbiological analyses. Break-resistant, autoclavable. Use narrow-mouth (28 mm) for liquid samples and wide-mouth (38 mm) for solids. Leakproof linerless PP closure. Molded-in graduations at both 90 and 99 ml for easy preparation of 1/10 or 1/100 dilutions in the same bottle. Accurate to ±4 ml. Resistant to strong acids, alcohols and bases. Clear, withstands repeated washing and autoclaving. Temperature range -40°C to +121°C.