See our Company Profile About Us Zhejiang Chaoan Mechanical Co., Ltd. is located in Diankou Town, Zhejiang Province, which is praised as the Capital of Hardware. Established in 1995, with years of hard work, our factory has been proved to be a professional manufacturer of different styles of injector sleeves, air brake coils and seven core cables. Our company has cooperated with domestic famous diesel engine factories for OEM injector sleeves, like Yiqi Wuxi Diesel Engine and China Yituo (Luoyang) Diesel Engine Factory. For air brake coils, we both have single-layer and multiple-layer products. Our seven core cables are produced strictly according to UL and SAFJ1128 Standards, mainly pointing to Europe and America.