These extra tough Delrin test tube racks are designed to resist most acids solvents and heat. They are ideal for smaller spaces. A moulded index co-ordinates and flat labelling areas keep samples organised. Half sized racks are convenient for incubators fume hoods refrigerators and other tight spaces. Overall size: (L)245 x (W)108 x (D)72mm.Number of 17mm wells: 60