1984 aluminum sliding glass door rollers

Hello! Thanks for posting. We sell a bunch of rollers that may replace this, though the best match will depend on size. I admittedly can't make out your exact dimensions from these photos, so I recommend carefully reviewing the measurements we show for each product to confirm the best match. See our 81-023, 81-278, and 81-279 to start out. We have others but I'm hoping one of these is a winner. If not, let me know and we can look at what else we have.