This dependable, self-filling pipetting aid is designed for speed, ease, and convenience, offered in two models.Polypropylene handle is ergonomically designed for extended use without fatigueTeflon® plunger assures smooth, consistent operation; dispensing volume adjusts via the base knobAccuracy is ± 0.5%Teflon® Tip model has excellent chemical resistance; Luer Lock model includes a chrome-plated steel fitting with removable cannulaAutoclavableNote: TEFLON® is a registered trademark of The Chemours Company FC LLC and used under license by Bel-Art Products, Inc.