4 layer auto ac hose(thick wall) Application media: R134a,R404a Application temp: -40℃~ +135℃ Standard: SAE J2064 E-R134a four layers ac hose(A20) Type Szie I.D(mm) O.D(mm) Wall(mm) 3” 5/16" 8±0.4 19±0.5 3.5 4” 13/32" 10±0.4 22.3±0.5 3.6 5” 1/2" 13±0.4 23…