| Garage Door Opener Spring and Trolley Nut |
 This manufacturer-approved spring and trolley nut (part number 41B4103-1) is for garage door openers.Spring and trolley nut 41B4103-1 maintains tension on the trolley for smooth operation when opening or closing the door.Unplug the garage door opener before installing this part. Wear work gloves to protect your hands. Price: 13.64 |