The Communications Plug Assembly is sold as a retrofit for the DESCO Air Hat. This assembly is a Male Marsh Marine Type plug and watertight bulkhead fitting for the DESCO Air Hat, or other helmets, with a ¼” NPT opening or port for installation. Two Wire or Four Wire Male Plug Pigtails are available. The bulkhead fitting is installed in the helmet using either plumbers putty or epoxy. Length of assembly is 24”. As a standard the male plug is installed on the helmet, and the female plug on the umbilical. See the Communications page for the corresponding female plug pigtail.