MBP 1.5 mL Blue Boil-Proof Microtubes by Molecular Biology Products are blue polypropylene tubes rated to 16,700 × g, with 0.1 mL graduations and a SnapLock cap that stays closed during heating. The blue color helps code samples by project or user. Tubes are non-sterile, certified RNase-free, DNase-free and nonpyrogenic, and packed 500 per unit, 10 units per case.