This chair base is good value for money. It is well made, and the mechanism is smooth and easy to operate. It is easily assembled in a few minutes, so you can rejuvenate a chair that is otherwise in good condition except for the base. Just make sure the mounting holes are the same. However, there was no packing material inside the box it came in, and the box was badly damaged with rips and tears and squashed! one of the base legs was protruding from one of the holes! Fortunately there was no damage to the chair base itself however. I did take photos of the box in case I needed to make a warranty claim, but since there was no damage to the base I had since deleted them.