This full-size Unwire? test tube rack securely holds a full load of forty 25mm test tubes or centrifuge tubes in a 4 x 10 array. Molded in bright yellow acetal plastic with Resmer manufacturing technology which makes the rack keep its bright color longer. Useful in a wide temperature range with good chemical resistance. Autoclavable. Color: bright yellow. Material: acetal plastic. Dimensions (L x W x H): 300 x 121 x 92mm. Tube diameter: 25mm. Array: 4 x 10. Nalgene #: 5970-0225.