2" Nylon Garage Door Rollers 4" Stem (set of 2) The 841LM works automatically with

The 841LM works automatically with your garage door opener so it always locks and unlocks with every operation of the door

each tube a single application

For use with various chain drive garage door openers that utilize a T-rail and have a 8' garage door

Also known as: 12C582

1200 Series

2" Nylon Garage Door Rollers 4" Stem (set of 2) The 841LM works automatically with2" Nylon Garage Door Rollers 4" Stem (Set of 2) For residential sectional doors 7 16" diameter 4 inch stem Deluxe nylon rollers provide a smoother and quieter opening and closing of garage door 11 ball bearing commercial grade for smoother operation Keeps the noise down when garage is attached to the house Replaces steel rollers