The Premium Pasternack PE44293 - TNC Male Connector Crimp/Solder Attachment for PE-C400, PE-B400, PE-B405, LMR-400, LMR-400-DB, LMR-400-UF, 0.400 inch is a high quality all metal Connector With 11GHz of maximum operating frequency. The Pasternack PE44293 - TNC Male Connector Crimp/Solder Attachment for PE-C400, PE-B400, PE-B405, LMR-400, LMR-400-DB, LMR-400-UF, 0.400 inch provides unsurpassed quality and reliability for your mission-critical systems.