Traxxas long big bore shock are pre-assembled shocks, only requires filling which is included oil, attaching included spacers and (not included) springs. Big-bore long shocks are hard-anodized and teflon coated T-6 aluminum.

INCLUDES: Two Shock Caps (aluminum) One Silicone Oil Bottle
Two Cylinders (aluminum) 1-1/2" Three Diaphragms (black rubber)
Three Large C Clips Two Ball Ends (white plastic)
Three Flat Washers (nylon) 6mm Two Bushings (metal)
Two Spacers (teflon) 5mm Four Pistons (black plastic)
Six "O" Rings (blue) Two Spring Retainers (plastic)
Two Flat Washers (nylon) 5mm Two Spring Spacers (black plastic)
Five Small E Clips
Two Shock Shafts (1-3/4"x1/8") approximately
Twelve Spring Adjusters (various size)