Established in 1976, HSI Corporation specializes in producing custom hydraulic cylinders. Based in Bay Springs, Miss., the firm houses an 84,000 square feet plant. Some of the cylinders it manufactures include telescoping crane cylinder, luffing cylinder, rig skidding cylinders and hydraulic electrode lift cylinders. In addition, the company also performs repair services on large bore cylinders. Some of the customers the firm has previously served are American Bureau of Shipping, Det Norske Veritas and The United States Coast Guard.