Introducing the Yeah Racing Desert Lizard Piggyback Internal Spring Scale shocks for crawlers, comes pre assembled for easy upgrading your current rig! Included are springs for you to Featuring a double O Ring sealing cartridge which prolongs the lifespan of the o rings inside the shock. In this version of piggyback shock, the compression and rebound is further controlled by the piggyback. Hardware required to install these shocks onto the crawler is included Feature: For: 110 Crawlers Material: Aluminum Color: Black Include: Desert Lizard Piggyback Internal Spring Dampers (2 pcs)