50 ul, Filtered, Liquid Sensing Pre-sterilized Tips Black Corbitt Robotics The filter tips reduce the possibility of sample cross-contamination from aerosols. Tips are 100% polypropylene, automation-grade and manufactured to ensure straight, leak-proof products free of DNA, DNase/RNase, PCR inhibition, pyrogen/endotoxin and trace metals. Case of 10 racks.