Review on Lichamp R134A AC Gauge Set: Efficient Diagnostic Manifold Gauge for R134A R12 R22 R502 Refrigerants - Freon Charging and Evacuation by Ryan Fitch

I used it 1 time to charge the air conditioner on my old ranch truck and it worked great. I pulled the gauge again to check the gas station on the same truck as the air conditioning compressor briefly ran and the high pressure valve had ruptured and was leaking when I opened the valve. I'm not aware of any type of guarantee for this product, but I'm aware that some very poor quality components are used considering the price. Spend a little more and get better equipment.