For thawing, cooling and incubating at high or low temperatures. Thermo Scientific™ Nalgene™ Polypropylene Floating Tube Racks are designed specifically for genetic engineering, microbiology and immunology laboratories. These racks offer excellent temperature resistance from -70°C to +100°C (-94°F to +212°F). Tubes are held in the rack under the rim. Square or round racks have letters and numbers engraved on each well for easy specimen identification.Meer tonenMinder tonen