Otis Lift door Hanging roller

Otis 85-20-6204 roller(Metal) Otis Lift door Hanging roller Otis 85-20-6204 roller(Metal)

Otis 85*20-6204 roller(Metal)
Single Grooved / Hanging / Pulley Wheel
Otis Lift door Hanging roller

Roller Size is：
The length is 85mm
The thickness is 20mm
Bearing is 6204/6204Z/6204ZZ

The wheels also have nylon ones, which is cheaper than metal ones.
It’s guaranteed for a year. You get a new one for free for any change when the roller is running.