Tightening Torque: Follow the manufacturer's recommended torque specifications when tightening fittings and connections. Over-tightening can damage threads or cause leaks, while under-tightening can result in loose connections.

To make the recharging process even easier, this product comes with a convenient charging hose and digital gauge. The hose allows for easy attachment to your vehicle's A/C system, while the digital gauge provides accurate pressure readings to ensure proper charging.

In conclusion, there are four different sizes for auto A/C hose in the most common car air conditioning system. If the vehicle is a bus or coach, it will be a bigger A/C hose, like 7/8 inch and 1 1/8 inch. Make sure which part of A/C hose is broken, like hose from compressor to condenser, you can know the exactly hose size.

The hose size should be #8 13/32inch. It is the middle size in the whole car air conditioning system.