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Manufacturer Wholesaling Quality Sliding Patio Door Roller Slimline Tandem Double Wheels UPVC & Aluminium. Custom Color & Material: Wheel color customizable to Green; Casing material customizable to Stainless Steel. 5-Year Warranty: Comprehensive 5-year warranty coverage for product quality assurance. OEM & ODM Service: Professional design and solution support for OEM and ODM customization. 15+ Years Experience: Over 15 years of rich industrial experience in hardware manufacturing. Smooth Operation Design: Slimline tandem double wheels ensure effortless opening and closing. Verified Manufacturer: Leading China manufacturer with over 5000 sqm workshop and verified systems.