Prime-Line 2-Pack 0.875-in in the Bifold Closet Door Guide Wheels department at Lowes.com
Prime-Line Nail-Down Bi-Fold Door Top Roller Guide (2 Count) - Do it Best
Bifold Door Hardware Wooden Sliding Door Pulley Furniture Hardware Wheel Barn Door Roller Wall Door Folding Door Roller 1 Set - Furniture Casters - AliExpress
1piece Heavy Top Hung Tracked Door Roller Dual Pivot Swivel Wheels For Sliding Partition Folding Bifold Door - Door Rollers - AliExpress
Stanley® Top Pivot & Roller Guide for Bifold Doors | SH402126 | Build With BMC
Door Track Brackets | Bifold Door Track | All About Doors and Windows
Prime-Line® Offset Plastic Dial-A-Matic Bifold Door Roller Assemblies - 2 Pack at Menards®
Prime-Line N 6703 Bi-Fold Door Top Guide Wheel, Nylon (2-pack) - Bi Fold Door Hardware - Amazon.com