15mL Centrifuge Tube, Conical, Sterile. Additional info on MLS-CTPR-15P: Clear tube made of Polypropylene. Red cap made of HDPE (High Density Polyethylene). Screw type leak free closure. Volume: 15mL. Conical Bottom. Accurate and easy to read graduations. Packaged in plastic rack. Max Force 14,000G. Non-pyrogenic. Non-cytotoxic. RNase/DNase free to help ensure optimal reliability and performance. Manufactured under ISO 13485:2012 and ISO9001:2008 quality management system. 50/rack, 500/case