Specifications include, but are not limited to:Lab Products, Inc. Super Mouse 750 Ventilated Micro-Isolator Cage Rack and accessories. The requested ventilated mouse cage rack is solely compatible to the mouse racks from Lab Products Inc. currently owned for use in the University's research animal lab. All parts are uniquely interchangeable. Caging and water bottles are also specialized to the company. Per Lab Products Inc., their caging systems are designed, engineered and manufactured in their own manufacturing facilities. The K77080ARM RAIR HD Super Mouse 750TM Micro-Isolator 80 cage rack is a proprietary product manufactured and marketed solely by Lab Products, Inc. No other similar or like equipment from another vendor can provide compatibility to these type of racks. The racks are vital to the University’s federally funded research projects. Using the interchangeable racks allows the University to have change-out/emergency racks which is important to the viability of the research projects. The initial purchase accommodated the research needs at the time. It wasn’t until new faculty were hired, and existing faculty had increased needs, that we discerned additional racks were required. It is not possible to accurately predict research equipment needs in advance due to faculty arriving or departing, and the changing needs of current faculty based on grant/contract support and the changing nature of research projects in general.