Description:  Perfect for long-term freezer storage.
Condtructed of 2 very heavy pieces of expanded polystyrene(EPS). The 50-well holds 1.5-2.0ml microtubes and 1.2 ml cryovials(44mm-height maximum). The 100-well holds 1.5-2.0ml microtubes. Extra spacing between wells allows the user to easily pick out tubes. Round feet and stops make the racks stackable for maximum space efficiency. Available in packs of 10.