... .5 CCC,TUV,TS16949,ISO7375,OQS good after-sales servicetruck trailer couple headDetails:1)size: M22x1.5/M16X1.5 2)types: Electric ... connect the air brake system of the heavy truck,semi-trailer,full trailer,tractor etc.10.Available type:Germany design,auto type ... ,M22,we can also make accordance with your requirement. Automatic couple 452 200 012 0