Machined Billet Aluminum Old Man Emu Detailing Internal Spring Design Each weight: 0.38oz / 11g Hole to hole (Compressed): 2.18in / 55.5mm Hole to hole (Uncompressed): 2.75in / 70mm Overall Length: 3.1in / 80mm Travel length: 0.51in / 13mm Shock body OD: 0.39in / 10mm Shaft diameter: 0.137in / 3.48mm