Manufactured in a ISO9002 certified factory, these pipettes feature a high level of accuracy at a very economical cost. Specially designed for kits as well as individual use in schools, colleges and universities. Can be used with either microtips or standard 200ul tips. Fully autoclavable to 121 degrees C. 2-stage thumbpress includes blow-out. Specified accuracy for 5, 10, and 25 ul sizes is +/- 0.5ul, and for 50 and 100ul sizes. Pack of 1.