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 at the same time. This kit includes both components to ensure smooth and efficient garage door operation. Garage Door Opener Enhancement: Repair or upgrade your garage door opener with this high-quality gear kit, designed to restore operational efficiency and extend the life of your garage door system. Color: As shown in photo Material: Plastic Note: The actual product may vary slightly in color due to lighting and screen display differences. This does not affect functionality. Package Contents: 1 x Replacement Drive Gear and Worm Gear Kit Note: Other accessories are not included. Note: Slight variations in color may occur due to lighting and display settings. Measurement error allowance is +/- 1-3 cm.