I have 5 patio door with same part, I need to change them all but I couldn't find the wheel number...

Thanks for your patience during this busy season. I don't personally recognize this roller, but please give us a little more time to track it down. We will do our best to find a good match for you.

See if you roller matches up to our 81-126. It looks similar to yours, though I'm not 100% sure it will work. 

One thing I have done in the past was to use the 81-023 roller, which has basically the same dimensions as the 81-126. I found it worked well after it was in, but word to the wise: it does take some work to install. You need to remove the bottom rail off of the glass, drill and counter sink a hole for the 33-103 attachment screw.