RF ADAPTER/BNC jack to BNC jack, Pressurized, Bulkhead, 50 ohm 031-220HRF ADAPTER/BNC jack to BNC jack, Pressurized, Bulkhead, 50 ohmBNC jack to BNC jack sealed, bulkhead adapter.50 ohmsSilver-plated, beryllium copper center contactPTFE insulator materialProduct CodesMfr Part No:031..