Even if I inquired to the manufacturer already at the sash door 40 years ago, I did not have a door roller for maintenance, so it was extremely helpful.
It is perfect for adjusting the height.
The opening and closing also became light.
Purchase this product as an old entrance aluminum door saddle door roller replacement 3 to 40 years ago.
There is no similar product in the nearby large-sized home center from the Monotaro catalog
Two drill screws are attached, and it was easy to exchange with one impact driver.
Although it is satisfactory in quality, if the price is a bit cheaper it is even better if it is about 1,000 yen.
(There are 2 entrance doors, so if you exchange all, this product will need 4, so it will be a good price.)
After exchanging slippery like a lie, it became possible to open and close very comfortably.
I think that it is a niche product I would like you to sell for a long time.