Accomodates 18 pipettes with diameters not exceeding 10 mm, plus 10 pipettes with diameters not exceeding 15 mm. Small holes in base allow drainage. Boss head (supplied) allows for the holder to be raised or lowered on supporting rod of 8-14 mm using the olivessupplied. Use the custom designed dished base unit with PVC rod (Art 262) to complete the system.