Kasablanka corporation produces wide range of laboratory plastic products. This is an iso 9001-2000 certified company. Polypropylene micro tips are part of those products. Polypropylene micro tips are specifically designed for kasablanka make of mixed volume micro pipette. Tips can also fit on any regular micro pipette. Polypropylene micro tips are available in two different sizes 2 to 200 [yellow] & 100 to 1000 ul [blue].