C Connectors are typically used with Ludlum meters and probes. This is a type C to C cable (typical of Ludlum Instruments) with 5′ length. If you are buying a Ludlum meter with an external probe, you will need something like this one (check your connectors). We may have refurbished versions for a bit less in another listing while they last.
We have 3′ cables in another listing.
We make custom length cables with various connectors (such as BNC or MHV) on one or both ends. Let us know what you need.