how thick is heat tape?

im building a rack, and i want to put it together but i dont have the heat tape. i was gonna use cd's as spacers, but was wondering if i need to worry about the thickness of heat tape. i bought the 4'' from rbi, but is it thick? like construction paper thick, or cd thick or what?

My 11" flexwatt is 0.0125 inches thick. I used a Vernier Micrometer to measure it, that is accurate to 0.0001 of an inch.

For comparison a piece of white printer paper is 0.004 inches thick

and a DVD is 0.045 inches thick

so i dont need to worry about it, thanks serpent merchant:)

no problem

Dont forget the probe... It either needs a channel under of fit over which is quite large.