Magic Touch floating rack holds 1.5mL microcentrifuge tubes. Expanded Polymer Foam is flexible and holds tubes securely in place during use while allowing them to slide easily in and out when needed. Floats in water, dry ice/alcohol slurries and liquid nitrogen. Expanded polymer foam is chemical resistant, impervious to moisture and odors, and unbreakable under normal use conditions. The 36 place rack holds 1.5 mL microcentrifuge or similar diameter tubes. Fits 4.0L Midi and 9.0L Maxi Magic Touch Lab Pans. Dimensions: 23.5 x 10.8 x 1.0cm thick (9 1/4" x 4 1/4" x 3/8").