These Blue Anodized Shocks are designed to work with the MSA-1E range of vehicles. Precision machined and perfect as a natural upgrade from the MSA-1E's friction dampers, these shocks allow complete compression and rebound tuning via adjustable pre-load, changing oil viscosity and spring rate. Designed to be installed inverted, they help lower the rigs CG. You can set them up to your linking, and get your MSA-1E taking any terrain you throw at it with ease!