2021/04/22 · Manufactured from high-clarity polypropylene. BRAND™ Polypropylene Centrifuge Tubes can withstand RCF up to 3000. Graduated and CE-marked according to IVD-Directive 98/79 CE. Available non-sterile and y-ray sterilized in 15mL or 50mL capacities, with or without a base. Include polyethylene screw caps with sealing cone.