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1.85mm connectors are now rated to 67 ghz yet often its necessary to transition to an sma. These 1.85 to sma adapters protect the 1.85mm interface, which by virtue of its air dielectric is more fragile than the sma. Frequency is limited by the sma, 27ghz. These 1.85mm to sma adapters feature stainless steel construction, and the 1.85mm portion of the sma to 1.85mm adapter uses air dielectric & dielectric beads.