Hi Charlie,
I use small (about 8x10 inch) black kitchen cutting boards from the local
box store. I'm not sure what the material is some kind of 'plastic'. I
have shaped them using a table saw and drill press. I use them for center
insulators on several dipoles with an so239 mounted in the center and holes
for the elements and Dacron rope for mounting. I have had these insulators
for several generations of antennas (maybe 8 to 10 years) and the sun hardly
fades them at all. Of course I am up here in upstate NY summer sun and no
salt.)
Good luck
73 Joe K2UF
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