Comprehensive Compatibility: This Replacement Drive and Worm Gear Kit is compatible with a wide range of garage door openers, ensuring you find the correct match for your model. Extensive Model Coverage: Compatible with multiple models including 13953614SR, 139536151SR, 41A2817, 41C4220, 41C4220A, and others, providing broad compatibility. Recommended Replacement Practice: For optimal performance and durability, it is recommended to replace both the drive gear and worm gear simultaneously. This kit includes both components to ensure smooth and efficient operation of your garage door opener. Garage Door Opener Enhancement: Repair or upgrade your garage door system with this high-quality gear kit, designed to restore operational efficiency and extend the life of your garage door opener. Color: As shown in photo Material: Plastic Note: The actual product may have slight color variations due to lighting and display differences, which do not affect functionality. Package Contents: 1 x Replacement Drive Gear and Worm Gear Kit (Only the above items are included; other accessories are not included.) Note: Lighting and display settings may cause minor color differences. Measurement error is +/- 1-3 cm.