LeiSer O-ring Chain（雷瑟）  

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Zhejiang Leise Chain Transmission Co., Ltd. We specialize in manufacturing oil-sealed chains such as models 415HO, 428HUO, and 520SX. Our products have obtained TUV quality certification and EU product certification, and we are equipped with multiple AI automated production lines. Tel/WeChat: +86 18657285253 [Detailed Introduction]