<p>The length of hose is 19",for home use refrigerator ,A/C system adding refrigerant</p> <p>Come with gauge for easily viewing</p> <p>R-134a can be connected to the R-12 / R-22 service port for easy conversion</p> <p>3 different gauges R134, R12 and R22 for different types of Freon</p> <p>Made of corrosion-resistant metal and the hose adopted quality rubber material, high pressure resistance and sturdy</p>