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MTCA00071 SMA male to BNC male using flexible RG400 coax. This Milestek SMA male to BNC male cable assembly uses a 50 Ohm SMA for connector 1 and a 50 Ohm BNC for connector 2. Our male SMA to male BNC cable assembly uses a flexible cable type that is 50 Ohm. Milestek's MTCA00071 SMA male to BNC male cable assembly is constructed with MTRG400/U coax and the maximum VSWR is 1.4:1.