The Micro Classic™ Pipette Controller is a manual thumb-control unit allowing precision control for filling 1/2cc or 1/4cc straws (with or without wick-and-powder plug), unopette tips, IVF or TomCat catheters via a clear inner-tapering funnel-shaped port. Ergonomic and the head pivots to allow amibidextrous use at any angle. Great control for seeding straws for drawing air or liquid.