OHAUS Block Heater accessories include modular blocks to accommodate almost any sample Modular blocks feature close contact of tubes to walls allowing for optimal heat transfer and maximum heat retention Most blocks feature a thermometer well for measuring block temperature Blocks are anodized to resist corrosion and rust for long term use in the lab Low temperature covers help to reduce the airflow for additional temperature stability Applications . Incubation and Activation of Cultures Enzyme Reactions Immunoassays Melting Boiling Points Isothermal Incubations Nucleic Acid Denaturation Drying Slides Construction . Blocks are anodized aluminum low temperature cover is made of clear Plexiglass Design Features . Bocks feature close contact of tubes to walls allowing for maximum heat retention Most blocks feature a thermometer well Specifications . Sample Type 10 mm Test Tube. Number of wells 24. Well Diameter 10 7 mm. Well Depth 48 4 mm. Size 1 Block. Material Aluminum Anodized. Thermometer Well Yes. Weight 2 2 lbs