This is a set of Silver Shock Springs for the HPI Hellfire.FEATURES: Constructed of steel, black in color Color relating to spring rate is painted on endINCLUDES: Two Silver Shock Springs for the HPI Hellfire with spring rate chartREQUIRES: Installing over shock bodySPECS: Length: 3.1" (80mm) Diameter: 0.71" (18mm) Number of Coils: 10.5 Spring Rate: 5.5 (89) softCOMMENTS: Other shocks in this series include; HPIC8651 86551 Shock Spring 14.5 Coil Pink (medium soft) HPIC8653 86553 Shock Spring 12.5 Coil White (medium) HPIC2554 86554 Shock Spring Yellow (firm) jxs 3/21/06 ir/jxs