QA1's Aluma Matic non-adjustable shock gives you the best ride in rodding without having to worry about valving options. Lightweight Aluminum Body, Non-Adjustable, Coil-Over, 100% Dyno Test and Serialized, Revalveable and Rebuildable by the QA1 Factory or QA1 Authorized Service Centers, American Made, Precision Machined Aluminum Piston with PTFE Piston Band, 15mm Centerless Ground, Hard Chrome Plated, Solid Piston Rod, Three Step Sealing System.