Zhejiang OPT chain transmission Co., Ltd. A modern enterprise, is located zhejiang. China. OPT chain is mainly engaged in the production roller chains, coupling chains, bushing chains, motorcycle chains, conveyor chains, agricultural chains, leaf chains, pin chains, double plus chains, hollow pin chains, scraper conveyor chains, welded steel chains, stainless steel chains, etc. All products superior selection, strictly in accordance with international standards of production, products are best-selling in European, The United States and southeast Asia, also in the demestic market. It is the fastest-growing one of the modern chain manufacturer. Our products are widely used in industry, agriculture, construction, mining, metallurgy, petroleum, transportation, escalators, textile, food, medicine, chemical industry, printing and other industries.