Our low profile 3" (76.2mm) circular mounting base is an ideal mounting surface for almost any integrated breadboard application. It can be used in conjunction with our 0.5" diameter posts and post holders for setting to any required height. Convenient cross slots for mounting lenses and filters with our bar-type holder (#03-676). Mounts directly to tables/plates with a ¼-20 tapped hole. Additional ¼-20 holes make this component a must for the lab bench.