LIFETIME GUARANTEE: these rollers are specified at 100,000 garage door open & close cycle and we promise to replace any malfunctioning roller for the lifetime of the roller;ZERO MAINTENANCE: our sealed, 13-ball bearing keeps out dirt and grime while protecting the lubrication grease for a grand total of zero maintenance required;EXTRA QUIET ROLLERS: ball bearing, nylon garage roller wheels are ~75% quieter than standard, non-bearing garage rollers;EXTRA LUBRICATION: groove on roller to disperse grease over an extended period of time (lifetime guarantee);STANDARD WHEEL & SHAFT SIZE: 1-13/16 diameter, 1/2 shoulder, and 1/2 thick wheel. 4-5/8 long x 7/16 thick steel shaft

• Ultra-Life 2 Nylon Garage Roller with Sealed 13-Ball Bearing & 4 Stem
• Stainless Steel

Ultra-Life 2 Nylon Garage Roller with Sealed 13-Ball Bearing & 4 StemDURA-BILT