This is Set of Hot Racing Piggybacks for the Stock or Hot Racing 1/16 Shocks.
These items replace the shock cap on the original Or Hot Racing Shocks.

Silver and Blue anodized
The piggyback design is built to reduce air bubbles and provide
additional shock oil volume.
CNC Aluminum construction
HR logo on the piggyback (reservoir)

Two piggyback assemblies
Two Spring retainers
Two spring adjusters