Current guidelines pertaining to the housing of laboratory animals express caging standards for rodents in terms of minimum floor space and minimum height, relative to the body weight of the animal.

The mouse version comes in two lines, the BCU-1000 (42 cages, single-sided) and the BCU-2000 (98 cages, double-sided). Likewise, there are two types of rat racks, the BCU-3000 (30 cages ...