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302, No. 183, Tingyuan Quad, Xingang East Road, Haizhu Area, Guangzhou, Guangdong, China (Mainland)
Amazon source supplier 3 inch Heavy Duty Lockable Bearing Caster Wheels Swivel Casters with Brake for Furniture and Workbench, US $ 4 - 5.2 / Set, Customized, 1 9/64in, Polypropylene, POLYURETHANE, Steel, Polyurethane.Source from Guangzhou Ylcaster Metal Co., Ltd. on Waimaotong.com.