Globe Scientific introduces a line of 5-mL polypropylene (PP) macrocentrifuge tubes that are available in both snap-cap and screwcap varieties. They provide an efficient and economical alternative to 15-mL conical tubes when working with sample volumes between 2.0 and 5.0 mL. The 5-mL macrocentrifuge tubes with attached snap cap provide the convenience of 1.5-mL microcentrifuge tubes but hold larger volumes. The pierceable cap allows easy access by needle or syringe. Both varieties are graduated and suitable for use from -86° to 80°C for low temperature storage and general laboratory use, and are available sterile or nonsterile.