Sunnen Products Company is one of the leading manufacturers and distributors of bore sizing and finishing equipment in the world. The company offers a range of engine rebuilding equipment and abrasives. Operational since 1924, it serves clients in the hydraulics, engine building, and oil and gas industries. The company offers technical support and online order placement services. Sunnen Products Company manufactures a variety of lubricants, gages and honing machines. It maintains a network of more than 50 international distributors. The company s facility in St. Louis covers an area of over 485,000 square feet and employs a staff of nearly 500 people. Sunnen Products Company s subsidiaries include Sunnen Products and Shanghai Sunnen Mechanical Company.