Flexzion Ac Refrigerant Manifold Gauges HVAC Air Conditioning Charging Service Set PSI Kit Halogen Diagnostic Tool for R22 R410a R404a with Three 60" Hoses in Red Blue Yellow Large 2 3/4" diameter easy-to-read, dual gauges. High impact Pop-in lexan lens Manifold with built-in sight glass. Durable metal casing. Aluminum alloy testing manifold body High pressure or low pressure is selectable. Temperature in F for R410a, R22, R404a Diaphragm valves with swivel seals for more positive seal and less wear Rubber gauge covers for added protection. A heavy duty hook for hanging the gauges. No-flutter gauge design. Brass connection