AC hose 1.DN:6-19 2.Material:NR 3.Innter tube: ... hoseUsed in air conditioners of autos. Classified into F-134a and F-12a tubes according to cold media. The F-13a ... are highly resistant against permeation of cold media, oil, ozone, and heat. Low noise, good flexibility, stable tolerance, good assembly. Used in ... /16" , 13/32" , 1/2" , 5/8" , 3/4" AC hose