I bought two front stub axle gaskets for my truck from a main dealers and when I romoved them from the packaging they are both different thicknesses, I have one which is about the thickness of two copy papers and one which is as thick as a cheap Christmas card Which should it be? I will be back in the main dealers in the morning but which do I want another one of? Thick? Or thin?

 

I've used both paper and card type.