Brain slices of rat brain dies and molds including mouse brain dies. Brain mold precision machined and highly polished, ensuring sectioning process repeatability. Use materials are aluminum, durable, can be heated, cooled, autoclave, scrub, and can withstand the harsh conditions of use. Coronal brain mold having sagittal midline, can be easily separated left and right brain hemispheres. Slice precision accurate to 1 mm, the mouse brain mold also applies to newborn rats.