Soft castors for officechairs, are suited for use on hard floor surfaces.

If you have hard floors the soft castors will reduce sound and protect your floor.

Hard castors can press small stones and other objects into the surce of the floor.  

These castors have no brakes so they roll free.

Castors are easy to fit on the chair. The old chairs can be pulled out of the foot. Just click the new wheels on.

The dimension of the pin is Ø11 mm and 22 mm in height. They fit most chairs.

Also most gaming chairs.