Review on CNBTR U Groove Plastic Bearing: Optimal Max Load Power Transmission Solution by Brent Henderson

Used these wheels to replace the smaller ones that come with "Befenybay 3D Printer Filament Holder for universal adjustable filament mount on stand for PLA/ABS/Nylon/ Wood/TPU/Other materials for 3D printing" for my 3D printer. Spools of thread no longer slip off wheels. The spinning action is silky smooth. Good product.