41Pcs R12 / R134a AC Master Valve Core Repair Kit, Including Assortment R12 R134a Valve Core Refrigeration Tire Stem with Remover Tool for Most Cars

The tools are not cheap fit perfectly not lose at all. The springs on the valves are strong I haven't installed any valves yet will be doing that soon. Doubt ill ever use the large size never seen ones that big. Nice little set I agree with others replace both valves anytime you discharge a system. Nothing worse than a leaking valve with refrigerant only getting lot more expensive. The days of $1.99 for a can of R-134 are over.

Used this kit to repair a 2008 Ford Taurus air conditioner. Sealed really well.Quality was on par with local automotive store. The difference was the cost. Autoparts store wanted $40 buck for one low and high pressure valve. I got this kit for a similar price.Update: it’s been 1 year now and valves are still sealing perfectly!

I liked how it was packaged looks like valves are covered happy with purchase

Made the effort to do a proper transition from R12 to R134a late winter of this year (2020) while working with a dealership master technician who identified the leaks. My backyard mechanic skills finally had me with frigid A/C by April, but the mechanic warned there might be a minuscule leak on the retrofitted high side port. Early June the unfortunate "hissing" sound emerged from the vents and the day's commute turned into a hot Arizona mess. After diagnosing the problem (thanks to me fiddling too hard with the high side valve and a gauge manifold), I knew the problem wasn't the retrofit, but the valve core! 2 days later I receive this bundle of goodies and was ecstatic how easy the supplied tool backed out the culprit. Compared original core to this kit and found the match. 4 weeks later, after 20 days of 110°F+ temps, my A/C is blowing <40°F. Kit highly recommended for OBD1s and the variety for newer vehicles.

Good