Isotherm Mini Cooler -20°C for 20 tubes from 0.5 ml to 2.0 ml. With alphanumeric ID code on the lid and the lower section. Temperature-conditioning of reagents (enzymes, DNA, RNA, cell suspensions, etc.) on the laboratory bench. Made of resistant polycarbonate filled with non-toxic insulating fluid. No direct contact between the tube and the insulating fluid. With non-slip feet.