4 PCS 40 mm x 30 mm Nylon Roller Wheel with Bearings, CNC Guiding Wheel Flat Belt Idler 40 MM Diameter 30 MM Width 8 MM Bearing Bore: Amazon.com: Industrial & Scientific
Prime-Line 1-1/2 in., Nylon Roller with Ball Bearing Replacement (2-pack) D 1506 - The Home Depot
4 pcs 2 inch Nylon Roller Wheel with Bearings, CNC Guiding Wheel Flat Belt Idler (2" Diameter - 1" Wide - 1/2" Bearing) : Amazon.in: Industrial & Scientific
DURA-LIFT Ultra-Quiet 2 in. Nylon Garage Door Roller with 13-Ball Bearing and 4 Stem (10-Pack) DLR13 - The Home Depot
50 mm Nylon Roller Wheel Plastic Bearing CNC Guiding Wheel Flat Belt Idler | eBay
nylon rollers with bearings - Anyang Honesty Technology Co.,Ltd
Nylon Wheels | Buy Industrial Wheels | UK Supplier