Maury precision 2.4mm in-series adapters are low VSWR and low loss devices that operate from DC to 50 GHz. The models 7921A, B and C offer combinations for in-series adapting and are phase matched, making them ideal for use in precision measurement applications. These adapers are minimum length and feature a square-flanged body for ease of connecting that also prevents them from rolling off flat surfaces. They are useful as “test port savers” when used with automated network analyzers such as the Agilent 8510, etc. The models 7921D and E are bulk-head and panel mount feedthru adapters respectivley, and are designed for instrumentation applications.