Cooling block, 24-tube 1.5 ml

Pre-chilled aluminum benchtop holder from QIAGEN that keeps 24 standard 1.5 ml microcentrifuge tubes cold during nucleic acid extraction, enzymatic reactions, and other temperature-sensitive sample preparation steps. The anodized block is stored in a laboratory freezer, typically at -20 degrees C, and then transferred to the bench so reaction vessels stay chilled while reagents are pipetted and mixed. Conical 1.5 ml tube wells maintain firm thermal contact with each tube, slowing the thaw of restriction enzymes, ligases, polymerases, primers, and master mixes during multi-step protocols run at room temperature. Compatible with common snap-cap and screw-cap 1.5 ml tubes used in DNA and RNA workflows, the block fits typical molecular biology bench layouts and complements QIAGEN primary sample technology consumables such as QIAamp and RNeasy spin columns. Researchers commonly place the cooling block on ice or use it as a direct chill platform during proteinase K digestion, ligation setups, and reaction assembly, where keeping reagents cold preserves enzymatic activity and improves downstream recovery.