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Soft Closing Heavy Duty Silent Sliding Door Track Roller System. Heavy Duty Capacity: Supports door weight up to 250kg with high-quality needle bearings. Silent Soft Closing: Features smooth and quiet running with soft closing mechanism. Premium Material: Constructed from 304 Stainless Steel and Nylon for durability. Versatile Application: Suitable for 1-leaf and 2-leaf timber or MDF doors. Global Certifications: Certified with ISO, EN1527, EN12209, and ANSI A156.13. Professional Manufacturer: Leading door hardware manufacturer with 20 years of experience. Quality Assurance: Strict 5S management ensures low defective rate and high quality.