Bel-Art Pipette Support Rack; 16mm, 50 Places, 8 x 4&frac12; x 8&frac34; in, Polypropylene (F18953-0000) Safe, convenient storage; sturdy polypropylene rack holds 50 pipettes in a vertical 5 x 10 arrangement Top and middle decks have 16 mm diameter holes; bottom deck holes are tapered from 16 mm to 6 mm diameter Pipette tips will not contact table surface, end plates have handles for easy carrying Steam autoclavable at 121 degree C (250 degree F) Pipette tips do not touch table surface ensuring drainage and reducing potential for damage