What air pressure and compressor size do I need to run this jack?

Pressure and CFM specs are not included with the unit — check the nameplate on the jack body or contact the manufacturer with your serial number for exact requirements. Most shop compressors rated 5+ CFM at 90 PSI will work, but undersized air supply slows lift cycles.

Can I use this jack on grass, dirt, or gravel?

Not recommended. Soft ground doesn't provide the stable base this jack needs to hold 20 tons safely. Use it on solid concrete, asphalt, or a steel plate large enough to spread the load.

Does this come with hoses or fittings for my compressor?

The jack assembly is included; air hose and quick-disconnect fittings are not. You'll need to source hose and adapters that match your compressor outlet and the jack's air inlet port.