Precision molded from virgin, chemically resistant and contamination free polypropylene Tested for Fit and Function with most widely used pipettes on the market Fully autoclavable in steam at 121 C for 15 minutes Packing: 500 pcs., Color may vary Blue or White or Yell These tips provide maximum sample recovery and minimal fluid retention. Transparent polypropylene permits precise viewing of samples. Longer, thinner tip with ultrafine point helps eliminate sample hang-up and allows access to small tubes and deep well plates. The outer wall of the graduated tips has flush calibration lines that eliminate hang-up on specimen tubes.