This is the optional Big Bore Shock Set for the 2WD Traxxas Slash. These replace the plastic shocks that come stock with the kit. FEATURES: Strong aluminum construction, coated Anodized black with white springs Completely assembled INCLUDES: Four fully assembled shocks with white springs Mounting hardware One bottle of silicone oil REQUIRES: Filling shocks with shock oil and assembling onto the model cnh 5/8/09 ir/jxs BOX DIMENSIONS: 6.75" W. X 1.50" H. X 8.13" L. BOX WEIGHT: .53 LBS.