Adjustable, gearless micro meter with locking ring. Air piston system working with 2-step operation. Stainless steel pistons with Teflon sealing. (Si O-ring on Jumbo size) Simple colour-coded finger buttons indicate capacity. Accuracy (H20, 20°C): 5~15 uL <2%; 20-5000 uL <1%. Utilizes disposable polypropylene tips. In addition to the standard sizes, Excalibur Laboratories also offers a larger 1 - 10000 microLitre Varipet. This high-capacity pipette utilizes our special D-Tips for increased accuracy.