Boltigen R1234yf to R134a Adapter, R1234YF Quick Adapter Adjustable High and Low Side Connection R134a Quick Coupler Connection to R1234yf, R134a to R1234yf Conversion Adapters Kit for AC Refrigerant

Worked just as described. Attaches to my 134A manifold gauges and worked like a charm

Works well.

Used these to do two things; inject UV dye and recharge with a gauge set. Do NOT use these to put 134A into a 1234YF system!I have a gauge set with 134A adapters, but recently had to work on a car with 1234YF, got a cannister of the new stuff [very expensive :(] and didn't feel like buying another set of gauges or hoses, so I got these adapters. Added dye with my 134A injector (BigEZ injector) and then added a very small amount for leak detection purposes. Found the leak, repaired the leak (bad O ring) and re-charged to proper amount A/C was ICE cold.In their specific use case, which is for adapting old equipment to the newer stuff, these are great.Once again - Don't recharge your new system with the old refrigerant. One is a HFC(hydrofluorocarbon), the other an HFO(Hydrofluoroolefin).They both require different equipment to run and have different temperature tables, they do not operate at the same pressure at the same temperature. The new stuff is also a less flammable, therefore equipment designed to use it may not have the same flameproofing that the old systems have. DON'T DO IT.

This is exactly what is needed to hook up your r134a gauges to a r1234yf system on newer cars. Fit perfect was able to service my cars ac and didn’t have to take the car to the shop and get ripped off. Shop wanted 400 just to vacuum and refill system. Already had the gauges so I was able to refill system for $75 with these adapters.

Excelente

Good quality Great idea to be able to convert 1234yf HVAC systems to 134a highly recommend.

Seems to work well and seal good without leaking during charging but I found it had use my hand to apply pressure to the low side service port with the adapter installed because it wasn’t opening the schrader valve far enough and Freon wasn’t getting into the lines. Worked well enough for what I needed it for.

IF YOU DID SOME RESEARCH VIEW THIS REVIEW ---> you probably saw online that people say it doesn't work or if it does, you'll lose like 10% of cooling power. This is all a load of BS. The government wants all r134a a/c systems converted to r1234yf. TO DO THAT JUST MEANS THAT WANT YOU TO CHARGE THE a/c SYSTEMS WITH R1234YF. Meaning all r134a and r1234yf systems are the exact same. They're trying to use "global warming" as a way to make more money off of us. You can put r134a in your cars a/c systems to convert back from r1234yf ..OR.. if your car is already r1234yf, you can use these adapters to start flushing the system and refilling with r134a. You'll save hundreds of dollars. IT WILL NOT DAMAGE YOUR CARS a/c SYSTEM. I did this last week on my own personal vehicle. It works. I promise you.

The fittings make work easierI install the regular service hoses

Will up date when I do use them , they seen ok

Converts ur system from r134a to 1234yf works great

worked for me

Missing one piece, the tool in the video.