The 29J-35P is a 2.92mm Female to 3.5mm Male adapter from HASCO. This adapter can operate up to 34 GHz with a VSWR under 1.25:1. It is matched to 50 ohms and has a durability of 500 cycles.The adapter has a passivated stainless steel housing with a gold plated Beryllium Copper center contact and a PTFE dielectric.