Cylinder base engine gasket for YPVS350, laser cut in custom thicknesses for fine tuning of squish and compression.  Choose from 0.15mm, 0.20mm, 0.25mm, 0.40mm, 0.50mm, 0.80mm, 1.00mm, 1.20mm, 1.60mm, 2.00mm, 2.40mm, 3.00mm, 4.80mm, 6.40mm.  OK, anything thicker than 1.2mm needed may be an indicator of other problems that need addressing more urgently, but that is the full range of paper thickness available and any shape can be laser cut from them, so who knows what you may need one day.  Give us a call for quotes on any special gasket needs.