Apantac ROSS FSB-OGX Design openGear oGx Frame Rear Support Brackets The openGear oGx Frame Rear Support Brackets from Ross is designed to help reduce mechanical stress due to cable weight, the FSB-OGX rear support brackets are on compatible for the openGear OG-X-FR frame series. The FSB-OGX are specifically engineered to compensate for extra load stress associated with certain applications, such as mobile truck installations, to also support the rear of the OG-X-FR frame series.