1,Supply truck trailer spring air double brake chamber. 2,Single chamber and ... , semi-trailers. 1,Supply truck trailer spring air double brake chamber. 2,Single chamber and double air ... T-24 BPW standard Produce brake parts similar like brake drum,brake lining,brake air chamber,slack adjust, adjuster ... concentric degree within 0.02MM strictly. 4.HJ brake lining is high performance, non-asbestos, non- ...