This is the Shock Spring Set for the Short and Medium MDX Shocks used on the Custom Works R/C Enforcer and Intimidator. FEATURES: Steel construction Assorted compression rates INCLUDES: Two each; 5lb Shock Springs in Yellow 6lb Shock Springs in Red 7lb Shock Springs in Green 8lb Shock Springs in Silver 9lb Shock Springs in Grey 10lb Shock Springs in Black 11lb Shock Springs in Platinum 12lb Shock Springs in Orange 14lb Shock Springs in White 16lb Shock Springs in Red REQUIRES: Installing on shocks SPECS: Length: 1.25" (32mm)