Investment cast 316 stainless steel construction. Designed to allow antenna wire to feed directly through the base eliminating the need for a separate cable grommet. Base is designed with a recess which, when filled with silicon sealant will make a water tight fitting. Ideal for TV, Loran, GPS and VHF antenna's with standard 1" - #14 threads.

Size-4" H, Fastener-1/4" FH