Mastercool 59161 Brass R410A, R22, R404A 2-Way Manifold Gauge Set with 3-1/8 Inch Gauges, 3-60 Inch Hoses and Standard 1/4 Inch Fittings 100% U.S. designed, assembled and tested HEAVY DUTY FORGED BRASS BODY gives life-long durability and endurance FREE FLOATING PISTON TYPE VALVES allow for less friction and internal wear and tear extending the life of the internal o-rings GRADE 5 LEVEL HIGH PRESSURE HOSES with  SAE standard fittings using the highest technology rubber materials giving the hoses the most flexibility and reducing the risk of kinking 3 1/8 SILICONE DAMPENED GAUGES smooth out needle movement while the color coding of R410a, R22 and R404A provides immediate refrigerant recognition