Royco - 602 Coolant Fluid, Hydrolytically Stable, Dielectric, 5 Gall Pail RTV630-1LB The amplified dynamic noise-canceling microphone

The amplified dynamic noise-canceling microphone is engineered to minimize background noise and keep your transmissions crisp and intelligible over the intercom

This Vintage Metal Sign is hand made in the USA using heavy gauge American steel

Years      1967-1971

Heavy-duty solvent

Royco - 602 Coolant Fluid, Hydrolytically Stable, Dielectric, 5 Gall Pail RTV630-1LB The amplified dynamic noise-canceling microphoneRoyco 602 Coolant Fluid, Hydrolytically Stable, Dielectric, 5 Gall Pail This synthetic based fluid is composed of a highly branched, compact, and very stable synthetic hydrocarbon known as polyalphaolefin (PAO). Modern technology additives are provided to provide long term storage stability. ROYCO 602 offers exceptional performance over a wide temperature range and does not react with water, resulting in cleaner operating systems and longer component