The Research Plus was optimized for form and function. The ultra lightweight pipette meets the highest needs for precision and accuracy- combined with ultimate ergonomics and increased flexibility. The spring loaded tip cone achieves optimal tighntess and minimal attachment forces-doing most of the work for you. Make your volume adjustments with just one hand- only a few turns will get you to your desired volume. The four-digit volume display is easy to view. Dissassemble your pipettor with ease- the quick connection clip lets you remove the lower part in just 2 steps. The secondary adjustment gives you greater accuracy for specific liquid types. Safe, robust and ultralight pipettor is made from Fortron, which is resistant to acids, alkalies, mildew, bleaches,aging, sunlight,heat, and abrasion. Fully autoclavable for simple decontamination.