PRICE IS EACH
3/16" nominal diameter. Ruby Red hero jewel set in; mirror polished; nickel finished; coin edge bezel. Very high grade. Not cheap plastic or aluminum.
Suggested installation is in a BLIND 1/8" diameter hole about 1/32" deep using some super glue. The underside of the bezel has a shoulder on it that will sit down into the 1/8" blind hole and make it near impossible to accidentally knock-off.
See other listings for; Blue and, Yellow.