Suited for R12/R22/R502/R134a/R404a/R407C/R410a. Anodized large block aluminum body use sliding pistons with dual o-ring seals. Colored gauge are easy to read and re-calibrate. Optical sight glass aids refrigerant inspection. Valve handles are easy operation,even to oily fingers. Protective boots resisit to shock,vibration and pulsation. Usually include 3-pcs colorcoded standard charging hose. Every manifold is individually tested for reliability before packing.       please inform us which one you prefer below: