Deep Vacuum series 2 valve anodized aluminum block body with ¼" SAE 45° fittings, Vortech® Deep Vacuum Valves, extra large sight glass, oil-filled 3 ⅛" (80mm) Class 1.6 accuracy gauges, extra access port in center with Schrader® valve and hanging hook. 2 Valve Gauge Set for R22, R134a, and R404A. Superior refrigerant metering capabilities (PSI & °F). Certified 5 year trouble-free valve life gives you maximum unrestricted refrigerant flow and light touch operation. This unit features oil-filled gauges. Made In U.S.A.