: Look for a minimum working pressure of 500 PSI (low side) and 800 PSI (high side). Avoid any "dual-use" gauges that do not explicitly state these engineering limits on the gauge face or manifold body.
: Standard R410A gauges use a pink or light rose ring to indicate their saturation temperature scale. Choosing Between Analog and Digital buy r410a gauges
: Hoses must be rated for high pressure (often marked with ASTM D2000 compliance codes) and should ideally include low-loss fittings to prevent refrigerant spray upon disconnection. : Look for a minimum working pressure of