Forespar Lightning Master (Static Dissipater) 

"Lowers the exposure to a direct lightning strike by controlling the conditions which trigger direct strikes, i.e. build-up of static ground charge and formation of ion streamers. Continually leaks off the ground potential in low amperages over a long period of time. 21" Long dissipator mounts to masthead. For power or sailboats. From the same manufacturer which protects commercial broadcast and television towers."

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