These Twisty Tube racks made of Polypropylene (PP) make dilution and concentration study easier as it can transfer samples between 0.2ml PCR tubes to 0.5, 1.5 and 2.0ml tubes. Can be rotated and customized according to end-user application. These racks have tapered wells that securely suspend tubes and makes removal easy. With molded indexing for easy retrieval of tubes, these racks can withstand a temperature range of - 80°C to 121°C. Blue section holds 48 (0.5ml) tubes and the reverse side holds 48 (1.5ml) tubes, whereas purple section holds 96 (0.2ml) tubes and 48 (1.5ml) tubes on the other side.