Allentown offers a variety of plastic caging systems for housing mice, hamsters, rats, and guinea pigs. Cage bottoms are available in a variety of durable plastics, ranging from economical polypropylene to the highly durable RaTemp 400 (autoclavable up to 400°F/205°C). When combined with a wire bar lid and our family of Micro-Barrier Tops, these systems create a biologically isolated micro-environment within the cage. Autoclavable Reemay paper filters allow heat and gas transfer, without permitting airborne pathogens and allergens in or out of the rodent cage. When used properly with a biological work station, animals and research personnel are effectively protected from cross contamination in a HEPA filtered environment.