Fits All T3-4200 Gas Springs (All Strokes Lengths). Models Include: T3-4200X16, T3-4200X19, T3-4200X25, T3-4200X32, T3-4200X38, T3-4200X50, T3-4200X63, T3-4200X75, T3-4200X80, T3-4200X100, and T3-4200X125.Hyson Products