There are no seams at the mouthpiece or tip ends, thus no possibility of sample hang-up or accidental breakage due to an irregularity or weakness. One-piece construction pipette also provides improved accuracy with calibration to deliver at ±1.5%. Sterile, Individually Wrapped. Contains safety filter to prevent accidental flow of liquid to your mouth. Sold in packs of 10. Quantity discount is available for 10 packs and more.