can this be used on nissan vehicles?

Yes,all vehicles with R134 refrigerant

Do the adapters have the typical spring loaded arrangement on the bottom with a latching balls mechanism to attach itself to the line fitting?

Yes they push on to cars line fittings,description says 6-ball collar.lift collar to engage or remove adapter.

I can’t seem to get the high side attached, anyone else have this problem?

Mine worked just fine. Are you attaching it to the correct fitting? Is the knob in correct position when attaching? If yes to all that then maybe you have a defective item.

will these cps products qc14 couplers fit yellow jacket 42006 gauges/

Yes they both have standard 1/4 fittings.

Some deliveries may take a little longer than usual due to regional shipping conditions.

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COUPLER SET R134A HI/LOW

Product ID: 1570395

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🌍Made in China

📏10.92 x 10.41 x 3.30 cm

🔧Auto Accessory

Description

🔄 Transform Your Cooling Game!

DURABLE BUILD - Engineered for longevity and reliability.
USER FRIENDLY - Simple installation for both DIYers and professionals.
COMPACT DESIGN - Space-saving dimensions for effortless storage.
SEAMLESS CONVERSION - Easily switch from R-12 to R-134A refrigerants.
LIGHTWEIGHT CONVENIENCE - Weighs only 0.7 lbs for easy handling.

The CPS Products QC14SET Conversion Style Coupler Set allows for a seamless transition from R-12 to R-134A refrigerants, featuring a compact design and lightweight build for easy handling and storage. Made in China, this auto accessory is perfect for both DIY enthusiasts and professional mechanics looking to enhance their toolkit.

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