PE39255 is a TNC male to BNC male cable using RG178 coax. This Pasternack TNC male to BNC male cable assembly uses a 50 Ohm TNC for connector 1 and a 50 Ohm BNC for connector 2.
Our male TNC to male BNC cable assembly uses a flexible cable type that is 50 Ohm. Pasternack PE39255 TNC male to BNC male cable assembly is constructed with RG178 coax.