Description Matriculates with this Diploma go on to work in various disciplines. Through subsidiaries, Diploma makes products in three segments: life sciences, seals, and controls. Its life sciences business makes consumable laboratory items and instrumentation and provides related services for the health care and environmental industries. Its seals unit manufactures hydraulic seals, gaskets, and cylinders for fork lifts, dump trucks, and other heavy construction machinery. The company's controls segment makes wiring, connectors, fasteners, and control devices for the aerospace/defense, medical, motorsport, and rail and power markets. Diploma operates primarily in Europe and North America.