Certified free from Human DNA, RNase, DNase, Pyrogens & PCR Inhibitors The ideal tip for minimum sample retention Tips feature a super clear and ultra-low binding, hydrophobic surface that is achieved using special resins and state-of-the-art molding equipment No silicon additives are used during manufacturing so the possibility of sample contamination is eliminated Available non-sterile in self-standing bags and sterile in racks & reloading stacks