Better than hard-anodized shocks, Traxxas Hard-Coat shocks greatly reduce piston/housing friction, and this helps to prevent the heat build-up that can cause inconsistent performance. The coating actually permeates the T-6 aluminum, making it many times more resistant to wear and corrosion. Springs are not included 5-10-92/eke BOX DIMENSIONS: 4.75" W. X 1.25" H. X 4.75" L. BOX WEIGHT: .18 LBS.