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 COG and the end user can set them up to their linking, and get their MSA-1E taking any terrain they throw at it with ease!