MRC Executive Chairs Tilt Any Position Locking Mechanism/Office Chair Parts/Revolving Chair Mechanism/Chair Parts Replacement_Fine Quality 6" X 10.2" MOUNTING Holes FIT for Most Office Chairs Bed Hydraulic Mechanism  (Furniture Parts, Steel)

Heavy Duty 6" X 10.2" MOUNTING HOLES FIT FOR MOST OFFICE CHAIRS Heavy Duty Thick Seat Metal Plate, the strongest mechanism in the market DESIGNED TO BE HEAVY DUTY: Made of quality metal plate, this office chair tilt control mechanism is solidly built and designed to be heavy duty. Accepts standard gas cylinder Replacement Part for Office Chair Swivel Chair Executive Chair Seat Mechanism TILT-A Base Plate for Attaching Under Seat Padding Height Adjustment Any Position Lock and Rocker Mechanism