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DHport offers 543 knob manufacturers products. About 25% of these are Business & Industrial, 24% are Sports & Outdoors, and 51% are other knob manufacturers supplies. A wide variety of knob manufacturers options are available to you. You may purchase samples before making big procurement. There are 163 knob manufacturers suppliers, mainly located in China. The top supplying provinces are Shanxi, Guangdong and Zhejiang, which supply 47%, 19% and 8% of knob manufacturers respectively.