White 2.5" x 25' Double Jacket Fire Hose (Alum NH Couplings) Hose Size - 2 1/2 inches (Inside Diameter) Hose Length - 25 feet (Approximately) Male Coupling - Aluminum 2 1/2 inch NH / NST Swivel Female Coupling - Aluminum 2 1/2 inch NH / NST The Female Coupling Will Only Connect To A Male 2 1/2 inch NH / NST