RLA300-21 Hardware kit, 3-1/8" EIA Flange for 3-1/8" EIA Flange Connectors/Adapters, MFR: ERI

15093A Adapter, inner connector 3-1/8", EIA, MFR: Andrew (Clean Used)

ACX350-20 Adapter, inner connector, for 3-1/8" EIA Flange connectors, MFR: ERI

STD350-52 Adapter,3-1/8" to 3-1/8" eia, ERI

4852 Adapter, inner connector, MFG: ERI

RLA350-150 EIA FLANGE Reducer adapter 3-1/8" to 1-5/8", Adapter comes with: Hardware kit, Bullets, & O-Rings, Replacement for Andrew 1861, MFR: ERI

RLA350-NF  Between Series Adapter, 3-1/8" EIA to Type-N Female, 50 ohm, gas tight with pressure port, includes inner connector and flange hardware kit. Replacement for Andrew 2262, MFR: ERI