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Heavy-Duty Idler Roller for Reliable Mining Machinery Operations. Wide Material Selection: Available in C45 Steel, Cast Iron, Brass, Nylon, Plastic, and Aluminum alloys. Comprehensive Customization: Full customization, minor customization, and flexible options from samples or designs. Strict Quality Control: Self-check by technicians and final inspection by professional inspectors. ISO 9001:2015 Certified: Manufacturing process meets international quality management standards. Fast Sample Delivery: Samples delivered within 7-15 days; regular orders in 30-45 days.