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Plastic Nylon Roller Pulley for Door or Window. OEM Customization: Supports tailored designs based on customer drawings or samples. ISO Certification: ISO 9001:2000 certified ensuring quality and global compliance. Versatile Materials: Frames available in plastic, steel, aluminum, or zinc alloy. Durable Nylon Roller: Features a high-quality nylon roller for smooth operation. Splittable Design: Splittable structure allows for easy installation and maintenance. 20 Years Experience: Manufacturer with nearly 20 years of professional expertise. Global Reach: Products are popular in over 20 international market countries. Online Support: Provides online technical support for after-sales service.