Shock Absorber, Fixed, Material Resin, Force 0.5 lb, Max. Cycle Rate 45 per min, Max. Weight 6.6 lb, Rod Thread Size M12x1, Locking No, Rod Dia. 3 mm, Cylinder Dia. 12 mm, Ball Diameter 6 mm, Pin Dia. 3mm, Stroke 12 mm, Extended Length 70 mm, Compressed Length 58mm, Fixed Resistance Yes, Adjustable Resistance No