Does it give psi or psig? The gauge face shows the unit in psi (also see product details), while the temp-pressure mapping appears to be F-psig.

PSIG only. When disconnected the gauges read zero. The P-T chart for R-134a is fairly accurate to within around 3 degrees F, as far as I can tell, which means it is definitely PSIG/TempF.

Is this fahrenheit? i do not want celsius? the pictures show f but the third bullet point on the description says celsius? what is the truth?

These have Fahrenheit scale on them.

Under what circumstances should the pins (as shown in D, similar to tire valve pins) be unscrewed from the ends of hoses using the red tool?

I would say these are extra valve cores in case one goes bad

Are these low loss fittings?

If you buy this product, you will get: 1pc 3-way HAVC freon gauge (1/4" male), 3pc hoses (1/4" female), 2pc quick couplers (1/4" male), 1pc ACME adapter (1/4" Male to 1/2" Female), and 1pc can tap (piercing-style) (1/4" male). They are of good quality. If you need any further assistance, please feel free to contact our customer support. We will offer assistance in a timely manner.

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AC Manifold Gauge Set for R134a R12 R22 R502 Refrigerant, Car Gauge Set With 5FT Hoses, Adapter, Adjustable Couplers, Puncturing & Self Sealing R134A Can Tap Freon Charge Kit

Product ID: 353239190

Details

Brand
Orion Motor
Item dimensions L x W x H
21 x 19 x 9
Item weight
1.6 Kilograms
Material
Aluminum Brass
Number of Items
1

💧Real-time moisture indicator for coolant health

⏱️5FT reinforced hoses for flexible reach

🛠️Hybrid anti-shock gauges for durability

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Description

🛠️ Master your AC game with pro-grade precision and durability!

BUILT TO LAST - Premium brass and aluminum construction ensures corrosion resistance and long-term strength.
UNIVERSAL COMPATIBILITY - Works flawlessly with R134a, R12, R22, and R502 refrigerants — your all-in-one AC solution.
PRECISION MEETS DURABILITY - Hybrid oil-filled & dry dial gauges resist shock and cold for reliable readings every time.
EFFORTLESS SETUP OPERATION - Complete kit with color-coded 5FT hoses, adjustable quick couplers, and versatile can taps for seamless HVAC servicing.
STAY AHEAD WITH REAL TIME MONITORING - Integrated moisture indicator keeps you informed on coolant condition, preventing costly system damage.

The Orion Motor Tech AC Manifold Gauge Set is a professional-grade HVAC tool kit featuring hybrid anti-shock gauges, 5-foot reinforced color-coded hoses, and versatile adapters. Compatible with multiple refrigerants (R134a, R12, R22, R502), it offers real-time moisture monitoring and durable brass/aluminum construction for reliable, long-lasting performance in automotive AC maintenance.

Specifications

ASIN	B07JLQTK9C
Best Sellers Rank	#55,811 in Automotive ( See Top 100 in Automotive ) #29 in Automotive AC Manifold Gauges
Brand Name	Orion Motor Tech
Customer Reviews	4.3 4.3 out of 5 stars (2,010)
Item Dimensions	21 x 19 x 9 centimeters
Item Weight	1.6 Kilograms
Manufacturer	Orion Motor Tech
Material Type	Aluminum, Brass
Model	OMTDMG201901
Part Number	OMTDMG201901
Unit Count	1 Count

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