2 Piece Sliding Barn Door Roller Guide, Nylon Guide Wheels Floor Rail Roller Flexible Heavy Duty Metal Hardware for Home Door Cabinets

Used this on a pocket door for guides. Solid core door so that was stable and slides great on the rollers. keep in mind you have to tighten the nut to the rollers as ours came loose and at first I thought the roller was just wobbly. Only about 1" tall to top of roller once you tighten it so would need to put something under it if the door had been any further off the ground. Worth the money.

Great for stopping a squeaky pocket door

worked great, just what i needed for a interior barn door to close properly

These looked good but we're not practical for what i needed, they were good quality and price though

Excellent... Even better than I thought they were going to be. Very robust rollers, far superior to the plastic guides that came with the sliding door pack I originally bought. Brilliant upgrade. Highly recommend.