Appli Parts Analog Single Manifold Low Pressure R134/R22/R404/R410 Pressure psi Temperature Fahrenheit Scales Apmg-A3l Construction: Solid Brass Body, Aluminum Alloy Gauge With Protective Rubber Use: For Charging And Servicing Lo Pressure A/C And Refrigeration Systems Scales: Pressure Scale: Psi -30 To 500. Temperature Scale: Fahrenheit -40 To +140 Includes: Manifold Gauge For Lo Pressure With Rubber Protection Boot And 2 Connection Ports For 1/4 In. Sae Connection: 2 Manifolds Ports With 1/4 In. Connections