All Öhlins shock absorbers are developed from the knowledge and experience of top factory race teams around the world, Superior construction, superior materials and superior engineering skills give you the best-quality shock on the market, Shock body is precision-drawn steel with aluminum shock reservoir; race shocks feature lightweight, high-strength aluminum shock bodies, Stainless steel braided PTFE hose used with all remote reservoir shocks, Springs are chrome silicone, All aspects of basic shock setup and performance are thoroughly tested to ensure that each shock absorber performs flawlessly, Öhlins shock absorbers are 100% rebuildable so you get lasting quality - you can readjust, reshim and overhaul the shock absorber for years of peak performance, Supported by Factory Authorized Service Centers in the United States