Bel-Art Pipette Support Stand; 28 Places, Polypropylene (F18955-0000) For safe and orderly storage of up to 28 pipettes This polypropylene stand has a two-section top plate; one with 10 holes, 14mm in diameter, the other with 18 holes, 11mm in diameter Holes in the lower plate are 4mm in diameter and support the tips of the pipettes as they are held in the stand Steam autoclavable at 121 degree C (250 degree F)