QIANJIEER multi-functional test tube rack allows you to organize a wide variety of tubes for chemistry, biology and other lab work. With its double panel design featuring 84 and 102 positions, QIANJIEER test tube rack can hold everything from common 0.2ml microcentrifuge tubes up to larger 5ml tubes(0.2ml, 0.5ml, 1.5ml, 2ml and 5ml tubes). Numerical markings make it easy to identify individual tubes at a glance. The sturdy plastic construction keeps tubes secure during transport or storage without risk of spillage. Whether you need temporary racking between centrifuge runs or a way to archive samples in your lab, this 3-pack of racks provides flexible storage and organization options to help keep your workflow tidy and materials well-labeled.