2.Can be used on all car A/C, commercial and domestic A/C and refrigeration systems.
3.Gauges are marked for R12, R22, R404A and R134A pressure reading.
4.Color-coding on gauges, valves and hoses for convenient operating.
5.Comes with a hook and 3 hoses (red, blue and yellow).
Manifold are 2-way and made of brass.