Globe's extensive line snap cap microcentrifuge tubes are available in either polypropylene (PP) or polyethylene (PE). Sizes range from 0.5mL to 2mL. Graduated tubes facilitate accurate sampling. The polypropylene (PP) tubes are resistant to most chemical reagents and can be autoclaved at 130ºC. The polyethylene (PE) tubes are softer and can be easily cut to provide access to material at the bottom of each tube.