Special feature is the effective blow-out button...finally eliminates mouth pipetting even for those applications requiring blow-out! Provides fast, efficient and accurate onehanded control of manual pipetting operations. Each unit can be used with glass or plastic TD or TC pipets from 0.1 to 100 mL. Easy handling: a single lever controls liquid aspiration and delivery. Better control: unique valve system provides outstanding accuracy when adjusting both small or large volumes. Safer: a 3 µm disposable hydrophobic membrane filter acts as a barrier to prevent accidental contamination. Constructed of autoclavable and chemically resistant materials and is easily disassembled for cleaning. German made quality.