David Clark Boom Guide Kit – OEM Mic Boom Support for Headsets (12840G-20) aviation intercom They combine non-metallic additives with

They combine non-metallic additives with selected high viscosity index base oils to give exceptional stability

Formulated with the same high-quality base oils as used in Phillips 66® X/C® Aviation Oil

35 Ohm impedance

GMS 4115 - C-48(168) - GULFSTREAM

Requires optional bracket 809 for use on aircraft

David Clark Boom Guide Kit – OEM Mic Boom Support for Headsets (12840G-20) aviation intercom They combine non-metallic additives withDavid Clark Boom Guide Kit OEM Microphone Boom Stabilizer (12840G 20) Overview The David Clark Boom Guide Kit (12840G 20) is a genuine OEM component that provides secure support and smooth articulation for the microphone boom on compatible David Clark aviation headsets. Ideal for replacing worn, loose, or damaged boom guides, this kit helps restore headset performance and comfort. Key Features OEM Factory Part: Precision manufactured by David Clark