Anzhuo Hardware 304 Stainless Steel Bifold Door Roller with Hinges - China Bifold Door Roller, Bi-Fold Door Hardware | Made-in-China.com
Prime-Line Bi-Fold Closet Top Roller Guide, Nail Down Style, 7/8 in. (2-pack) N 6614 - The Home Depot
Prime-Line Bifold Door 7/8 In. Top Roller Guide (2 Count) - Power Townsend Company
H-3403-Vitaly BI-FOLD DOOR ROLLER – wujinwu.store
Door Roller With Holder for Multi-brand – Echo Elevador Partes
Prime-Line N 7263 Bi-Fold Door Top Pivot and Guide Set, 7/16 In. Steel Housing (2 Pack) - Bi Fold Door Hardware - Amazon.com
Amazon.com: Harrier Hardware Spring-Loaded Bi-Fold Door Top Roller Guide Wheel, 4-Pack : Tools & Home Improvement
Bifold Door Hardware Wooden Sliding Door Pulley Furniture Hardware Wheel Barn Door Roller Wall Door Folding Door Roller 1 Set - Furniture Casters - AliExpress
Source Stainless steel casting heavy duty bifold door roller for patio folding door hardware on m.alibaba.com
1piece Heavy Top Hung Tracked Door Roller Dual Pivot Swivel Wheels For Sliding Partition Folding Bifold Door - Door Rollers - AliExpress
Bi-Fold Door Hardware | UPVC Patio Doors | UPVC Maintenance Supplies in Yorkshire