MBP Universal Fit Pipette Tips by Molecular Biology Products are polypropylene tips for 200 µL, 300 µL and 1000 µL pipettors, with flexible walls and internal sealing rings for a secure fit on most single- and multichannel models. Choose clear, yellow or blue tips, bulk or racked packs, sterile racks, or Maxymum Recovery low retention versions. All are certified RNase-, DNase- and human DNA-free.