Less Dripping with Wobble-not Wobble-not serological pipets have a patented innovative 2-tier step design at the plug end vs. traditional pipets that have a straight cylindrical shaped plug end. Wobble-nots are the only serological pipets that will give you two zones of contact in your pipet controller's nozzle. Insert with less force. No jamming. Plus, you get maximum stability which means less dripping and more accuracy! Low-Insertion Force Serological Pipet: Unique patented 2-tier step design at plug end Available in 10 and 25mL size, individually wrapped in paper/plastic only Measure 10 inches tip to end to provide less hassle in tight spaces like a hood Compact design promotes better ergonomics and accuracy Shorter length helps prevent touching pipet tip to surfaces in the hood Sterile – RNase/DNase free Non-pyrogenic Accuracy ± 2% at full volume Filter at plug end made of porous polypropylene Ultra-clear markings