Plastic rods are thin and straight polymers that are commonly used to build frames, structures, and high-friction compressor parts, bearings, or seals. Discs are cylindrical shapes of plastic polymers that are often fabricated into precision parts like bushings and gears. Garolite rods and discs are strong and lightweight polymers that are excellent electrical insulators. They are often used in medical, aerospace, and machining applications. Polycarbonate and PVC rods and discs resist chemicals and are easy to thermoform and machine to construct tanks, valves, and piping systems.