Guangzhou CNF Truck Parts Co., Ltd. Is a professional manufacturer of automatic slack adjusters. We have over 15 years' manufacturing experience with strong technical strength and united staff. We have a wide range of product series, such as ABA-1, ABA-2, ABA-3, ABA-4, ASA-5, S-ABA, ASA-C, ABA-C and others which are served for the market of America, Europe, Australia, Asia, Africa and China