This is the Hot Racing silver alum. front adjustable spring damper (47mm) - 1pr for your Associated RC-18T Truck.This is the Hot Racing blue alum. front adjustable spring damper (47mm) for your Associated RC-18T Truck. FEATURES: Aluminum construction, silver in color Shock bodies are threaded for easy pre-load adjustments INCLUDES: Two threaded aluminum shock REQUIRES: No Assembly Need just add shock oil Shock oil. SPECS: Length: 2.12" (54mm) assembled Diameter: .40" (10mm) COMMENTS: If you like to use shock bladders it will accept the associated shock bladders.