This item was well packaged, clean and made with quality materials. I absolutely recommend it. My only sincere wish is for the gauges below to have more accurate readings. However, even if you think you are a techie or an engineer and can "just find out” you still run the risk of having your car damaged or injured by refrigerant. The paths within the valve assembly are not as one might imagine by looking at them. I had to find a few websites and videos that corroborated each other before I finally figured out what was really going on. Finally, for the cost of that package and that refrigerant, you can get two air conditioning services for your cars from an honest shop that knows what they're doing. And then this device won't sit in the back of the garage and gather dust for the rest of eternity. Trust me I got it, I ended up buying it. But looking back at this one. I think I would choose the store service if I could turn back time.
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