I think the information below is accurate for these gauges but I am not positive. I went to HVAC school, got these gauges and never used them. The gauges list for 125 + tax and shipping on the internet get them cheap here. If you have any questions, let me know.
Features & Applications:
This JB Industries brass manifold gauge / hose set features glow-in-the-dark 3-1/8" gauges. Features full flow design for faster evacuation/ charging. Coupled with an angled bar for better knuckle clearance in rotating the hand wheels and the original free flowing dual O-ring sealing system, the M2 is the classic American made manifold. Equipped with heavy-duty metal gauge cases for added durability.
Features:
•Surge dampened gauges for reduced needle movement
•Original free fl oating dual O-ring sealing system for faster evacuation/charging.
•Color coded refrigerant dials for easy reading
•Pull-out proof hanging hook
•Offered with 63.5 mm (21/2") metric gauges reading BAR/PSI, kPa/PSI, and kg/cm
•Angled bar for better knuckle clearance
•Easy turning plastic hand wheels
•Replaceable intake/hose holder fittings for storage
Specifications:
Number of Hoses: 3
Number of Valves: 2
Gauges High Side Red (psi): 0 to 800
Gauges Low Side Blue (psi): 30 in/Hg to 500
For Use With: R-410A, R-22, R-404A
Vacuum Port Size (In.): 1/4
Hose Length (In.): 60
Location: Syracuse
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