This is the second one of these dudes I have had and this one is more unusual than the first. Perfectly clear glass, has 4 holes at the top with a set screw, threaded base, and a coiled copper wire inside makes this the perfect addition to the oddity collectors collection. Very unique and unusual. $14 + $4.50 shipping in USA. NOW $4 + shipping. Please see my other insulators. Almost all have been reduced to move so I can add new pieces!