This is one DU-BRO #203 Universal Kwik-Switch Mount. The mounting bracket is adaptable to fit both small and large radio switches. This complete switch mounting set enables you to install your battery switch in minutes, anywhere in the fuselage, by drilling one 3/16" hole. Excellent for use in planes, boats, helicopters, and cars. The black nylon switch mount is adaptable to any wall thickness up to 3/8". It's new in the package from a hobby shop that recently closed. See the photos for the condition and more description.