Extended length tips allow you to reach the bottom of most 0.65mL microtubes. The top mounting port features a solid ring that prevents the pipettor barrel from touching the sides of microtubes, reducing the potential for contamination. The tips have an unbeveled, ultrafine dispensing end to allow the dispensing of sample volumes below 1µL. Low-binding tips feature a modified polypropylene resin that limits the adhesion of cells, rDNA, and other viscous materials. All tips are RNase- and DNase-free. Low-binding tips are also free of protease and human DNA. Sterile tips are endotoxin-free. Tips and hinged racks are autoclavable.