The Cryomold molds produce uniformly shaped, flat-surface specimen block when used with O.C.T. (optimum cutting temperature) compound, which is sold separately, for frozen sectioning. This can fit into Cryobar freezing wells of the Tissue Tek II microtome/cryostat with the use of an adapter. This product measures 25 mm x 20 mm x 5 mm. It is sold in a case of 1200.