Get the best for your Modern or Retro-Bike with the YSS Z-Series. Developed for optimum performance & a sporty image. * Self Adjusting Emulsion Gas Shock * Z-Series uses a reservoir with a bladder for smoother linear movement & better cooling * Better precision: calibrated Teflon coated DU Bushes & heat treated hard chrome shafts * To replace any shocks * Pre-Load Adjustment * Rebound Adjustment * Heat Treated Hard Chrome Low Friction Shaft * Long Life Seal Block, Bearing & Bushes Article: YSS Rear mono shock Gas