Photo 1 of 2 Pcs Office Chair Swivel Tilt Control Seat Mechanism 6'' x 10.2" Heavy Duty Replacement Tilt Control Mechanism with Office Chair Cylinder Replacement Pneumatic Gas Lift Piston

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Photo 1 of 2 Pcs Office Chair Swivel Tilt Control Seat Mechanism 6'' x 10.2" Heavy Duty Replacement Tilt Control Mechanism with Office Chair Cylinder Replacement Pneumatic Gas Lift PistonPhoto 2 of 2 Pcs Office Chair Swivel Tilt Control Seat Mechanism 6'' x 10.2" Heavy Duty Replacement Tilt Control Mechanism with Office Chair Cylinder Replacement Pneumatic Gas Lift PistonPhoto 3 of 2 Pcs Office Chair Swivel Tilt Control Seat Mechanism 6'' x 10.2" Heavy Duty Replacement Tilt Control Mechanism with Office Chair Cylinder Replacement Pneumatic Gas Lift Piston