The CBC difference starts at the bottom and works its way up. Two-way locking casters keep the table frame from moving while working with the isolator. 1½" powder coated steel frame provides superior strength and durability. The 1½" steel frame prevents sagging keeping the isolator level, and the powder coating provide superior protection against chipping or rust. The tabletop is made of ½" high-density polyethylene with inserts preinstalled for all filters, port and hold-down loop clamps. Next comes the 3/8" closed cell foam pad that the isolator sits on. Each system come comes with a blower and manifold with ball valve for adjusting the airflow levels. Our standard 5" diameter filters provide greater airflow throughout the isolator. This increased airflow results in better living conditions for the animals inside the isolator. An acrylic transfer port with a stainless steel base provides strength and more light for easier transfers. Each isolator is made of either 20-mil vinyl or 20-mil urethane film. Each isolator includes the CBC Glove Extension. The glove extensions help reduce the stress on the isolator and user. The glove extensions also increase the reach into the isolator. Inside the isolator includes a durable 20 mil urethane pad and a two nine cage polypropylene cage racks.