Don't stress! Along with optimal precision and accuracy, the Discovery Pro adjustable-volume pipettors are designed to maximize user comfort. Made from the high-quality grade materials, innovative features include a contoured handle, unique pushbutton-lever system, finger rest and a 4-digit counter that rewinds quickly. Additionally, it's a snap to set volume--and lock it in--while the pipettor's smart design ensures thermal insulation of internal parts, improving accuracy and durability.