Classic™ pipet tips from Labcon offer you solid performance and standard features that are available from other suppliers only as special upgrades. All our Classic™ tips have been made using virgin 100% medical grade resin. They all are Nuclease Free (Rnase/Dnase), something other suppliers charge extra to certify. And they all are packaged in sturdy racks, resealable bags, or Pagoda® refills. Designed to fit most pipettor brands.