I went out and measured the thickness of the material and it's a tad over 3mm, which is quite thick, I don't know how much is removed on the lathe to make it round, but if it's just a "skim", it should be fine. I'd watch those "ridges" though, they only serve to remove material and weaken the assembly. I still reckon it looks good though, of course as Bob mentioned, it'd look better attached to one of my oil coolers, ha ha! Cheers, Terry.