Office Chair Refurbishment Kit - Includes strong 5 spoke chrome base - premium 45mm castor wheels, gas lift piston and chair mechanism. Suitable for refurbishing or upgrading old, worn and damaged chairs - avoid the expense of buying an entire new chair. Strong steel mechanism plate with lever to raise / lower the chair and a tilt tension knob to control the tilt function. Mechanism bolt spacing: Left to right: 14.5cm - Front to back: 25.5cm - Top height: 46cm min / 58cm max. Please Note: Max Weight: 110kg. These parts will require very simple assembly. Please ensure the bolt spacing matches the underside of your chair. Please note: Not suitable for commercial use.