These adjustable racks hold Pasteur pipettes above receiving vessels. Each stand holds up to 20 long-tipped Pasteur pipettes (15cm). The bottom support can be set to the necessary height. Column tip height can be varied from 1 in. to 3¾ in. above the lab bench surface. Generous 1 in. center-to-center spacing permits the use of a variety of receiving vessels: vials, flasks, etc. Support racks for test tubes (12 x 75mm and 13 x 100mm) and centrifuge tubes (12mL) are also available.