Bel-Art F18520-0000 No-Wire Cuvette Rack; 10mm, 42 Places, 5.1 x 4.1 x 1.7 in., Polypropylene Easily assembled All-polypropylene rack provides gentle no-scratch support for fragile and expensive spectrophotometer cuvettes Forty-two 10mm light path cuvettes fit in this 6 x 7 row layout Steam autoclavable at 121 degree C (250 degree F)