Combination Unit
Holds:
24x0.2ml PCR tubes or 3x8-tubestrips for PCR (3x8 format)
35x500µl/0.65ml microcentrifuge tubes (5x7 format)
20x1.5-2.0ml microtubes (4x5 format)
All with V-bottom cavities

Solid Aluminum Block Units are designed to be used in conjunction with either coolers, chillers, and ice buckets to keep'em cold or on a hot plate to keep'em hot while working on the bench.
Because aluminum is such a great temperature conductor, these units will 'cold-down' or 'heat-up' quickly and evenly assuring a constant temperature throughout the block. Further, the cavities (or chambers) in each unit are engineered to 'surround' the majority of the surface area of the respective tube, tubestrip, or plate to keep them at a constant and even temperature throughout.