0.6 ml Microcentrifuge Tube manufactured by VIOX Scientific is made of high-quality biological polypropylene under ultra-clean production environment. The cap of tube is tight enough to prevent samples from leaking. The Microcentrifuge Tube features high-precision die manufacturing and precise plastic moulding process to ensure product quality and the uniformity/stability of inter-batch products. The internal and external walls are smooth. The tubes are of thin wall thickness.