With only 25 employees, Trotter Manufacturing Inc. is considered one of the largest U.S. producer of hydraulic valve spools to off-highway equipment OEMs. The spools control the restriction and flow of high-pressure oil in hydraulic cylinder valves used tractor and construction equipment lines. Skip Trotter, vice president Operations, likens his products to the processors in a computer. Our spools are literally the brains of the valve and these products constitute 90% of our shipments. Trotter Manufacturing Inc. has manufactured valve spools since 1985 and is particularly attentive to the tight tolerances in diameter and cylindricity. We routinely and consistently hold 0.00006" 0.00008" and there are simply no grinding houses in a 500-mile radius that can hold the tolerances we achieve on a daily basis. .