Cole-Parmer Aluminum Test Tube Blocks for 12 x 15/16mm ID Tubes - Durable Lab Equipment for Scientific Experiments & Research

Change the capacity of your dry block heater with interchangeable blocks. SpecificationsBlock Tube Vial Size Accepted: 15-16mm Description: Aluminum Blocks, for 12 x 15/16mm ID Test Tubes Universal Guarantee: 1 year Heating Blocks Width (in): 2.875 Heating Blocks Length (in): 4.375 Heating Blocks Block Number Of Openings: 12