Globe's extensive line of disposable microcentrifuge tubes are available in either polypropylene (PP) or polyethylene (PE). Sizes range from 0.25mL to 2mL. These tubes are offered with attached caps or without caps. 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.