Suited for R12/R22/R502/R134a/R404a/R407C/R410a. Forged brass body valve used sliding pistons with dual o-ring. Two compound pressure gauge colored scales are easy to read. Color-coded 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.