1. Includes dual manifold gauges and 3 pieces 1/4" SAE charging hoses, for R410a, R22, R404a refrigerants. 2. 3 color for easily recognition, red for high pressure, blue for low pressure, yellow for refrigerant bottle. 3. Aluminum alloy testing manifold body and brass connection for long lifespan; Diaphragm valves with swivel seals for more positive seal and less wear; Rubber gauge covers for added protection.