The Mastercool 59661 R410A, R22, R404A Ball Valve 2-Way Refrigerant Manifold Set features a solid, extruded aluminum body, large knobs,3/8" ball valve design for smooth flow, an extra large sight glass, and silicone dampened gauges that are easily re-calibrated in the field for increased accuracy. This product also includes a set of three 60" 1/4" SAE RYB hoses with manual ball valves and 3 1/8" silicone dampened gauges for smooth needle movement, displaying R22, R404A and R410A refrigerants pressure and temperature correlations.