Part of my chair broke a couple months ago (the piston part) and unfortunately AKRacing went out of business so I can't fix the chair, therefore I am selling off the useable parts from the chair I have since I can't fix it so look for my other listings. My chair was max series, but I believe some of these parts are interchangeable with other AKRacing Series, but check your part numbers to make sure. This is the plate that goes on the other side of the chair that is NOT the angle adjuster for the seat. The similar part to this has a lever that changes the tilt of the chair. This is just the opposite, but it does not have an adjuster angle piece. It works fine. Any questions feel free to ask.