TYPE: GAS PRESSURE UPPER FIXATION: EYE INNER EYE DIAMETER: 8 MM LENGTH: 345MM LOWER FIXATION: EYE INNER EYE DIAMETER: 8 MM ADJUSTMENTS: VARIABLE SPRING PRELOAD SPRING CHARACTERISTIC: 20-30 SPRING LENGTH: 220 MM SPRING DIAMETER: 46 MM COMPENSATION DEPOSIT: NO PISTON DIAMETER: 36 MM PISTON ROD DIAMETER: 12 MM