Manufactured to create a “super hydrophobic“ internal surface that reduces the binding and increases sample delivery accuracy. On average ULR tips reduce tip retention by nearly 85 % and decrease the standard deviation of the retained volume by more than 75 %. Human DNA-free and certified free from DNase, RNase and PCR inhibitors. Presented in sterile polypropylene racks. Natural color. Certificate of sterilization included (to be downloaded free of charge here)