I read in one of the PBF threads that the Coroplast should be 4 mill thick. I went to the sign shop today to get some but he didn't know how thick 4 mill was. He gave me a piece big enough to build a Pizza Box Flyer, it is 3/16" thick. Will that work? Can someone please measure the thickness of their PBF and let me know how thick it should be?

Thanks,

Tim