National Molding invented the Hetero-Cavity Custom Injection Molding System, which allows for 30 plastic parts to be produced simultaneously. This system provides a low-cost, easy-to-use solution for manufacturers needing small plastic parts, especially those requiring multiple or modular molds. National Molding is headquartered in Miami Lakes, Florida and has two additional facilities in Shanghai, China, all of which offer the Hetero-Cavity System for plastic injection molding.