First, I drew an outline of the gasket and placed all of the notable features. I then took multiple measurements of each length and width there was, including distances between features and radii.

Using the measurements from the sketch, I CAD'd the gasket utilizing SolidWorks. 

1. This is a photo of the part in GibbsCAM which is a software that is used for CNC machining process. Here, there 

This is the final product of the Gasket. All sections and shapes were aligned extremely well with the metal attachment.