Flame retardant thermoplastic housing. Pin contacts are brass; socket contacts are phosphor bronze. Both have plating options. Intermateable with other HD-20 connectors. UL Recognized and CSA Certified. Shell: Steel, tin plated. D-Subminiature Receptacle, Mounting hole PCB retention method feature, 2 shell size, gold contact mating area plating, tin-lead over nickel solder tail plating, round contact shape, tin plated steel shell, UL 94V-0 housing flammability rating.