FEATURES: For factory installed and retrofitted R-134a A/C system. DOT Cylinder. APPLICATION: 1/2" ACME Thread Top, Charging from low side port. Compatible with all R-134a A/C system. QUALITY STANDARDS: 1. Tetrafluoroethane 2. Purity of R-134a:99.9Min 3. Water: 0.003%MAX 4. Non-Condensable Gas at 250C:8%MAX 5. High Boiling Residue: 0.005%MAX 6. Perform Standard:GB/T 36765-2018