AOD Retail Division 6200Z Precision Sealed Bearing Garage Door Rollers, 10 Piece Ten- Pack Nylon Roller- 4" Zinc Stem- Professional Garage Door Rollers 13 Ball Bearings- 125lb Load 20'000 Cycles up to 12' tall door. Clear Nylon Capped Front Face- Field Tested Exclusive Dust Shield- Backside of Rollers 1 13oz AOD lube sent with every order.