This item is in the category Sporting Goods\Cycling\Bicycle Components & Parts\Rear Shocks. Constructed from proprietary Fox super light steel (SLS) 1.38 inside diameter fits Fox VAN/DHX/DHX2 -All SLS springs are orange and are marked with their spring rate in lbs/in (in 25 lb increments) and the maximum travel of the shock that they are designed to be paired with.