The top disc has holes for holding the pipettes while the lower one has pilot holes where the pipette tips rest and liquids drain down to the base. Both discs can be moved up and down the rod to accommodate various lengths of pipettes.
The top disc has holes for holding the pipettes while the lower one has pilot holes where the pipette tips rest and liquids drain down to the base. Both discs can be moved up and down the rod to accommodate various lengths of pipettes.