complexity required to produce a quality rubber part is unbelievable. And they are not all made from natural rubber and are not all black.Ronald Riley founded this family company...Southern Michigan Rubber,... Southern Michigan Rubber, Inc. - Southern Michigan Rubber, Inc. Home About Us History Manufacturing Capabilities Rubber Molding Lathe Cutting... Prototype and Special Projects Gallery of Work General Information Rubber Products Rubber Gaskets Rubber Grommets Hydraulic Seals Mechanical Products Pneumatic Seals Rubber to Metal...