As we have mentioned before, we can help you save money by providing washers instead of specialty gaskets. (You just make the bolt holes during assembly.) Today we are discussing 2 different ways to take that thought to the next step, and make your own gaskets out of FOIL. Method #1 Step 1: Measure flange inner and outer diameter. Step 2: Add 0.25” to determine foil width. (Example: 2” wide foil for a 1.75” diameter flange) Step 3: Contact us with your dimensions for 99.995%