Patented size coding means automatic tip volume detection by the HandyStep® touch and HandyStep® electronic. They also fit repeating pipettes from other manufacturers that use standard sized syringe tips. PD-Tip™ II tips are manufactured from virgin polypropylene and high-density polyethylene. Available in non-sterile and BIO-CERT® sterile. BIO-CERT® PD-Tip™ II Precision Dispenser Tips are sterile and certified free of DNA, RNase, endotoxins, and ATP to meet the most stringent sample integrity requirements. BrandTech® #: 705714.