This is the optional Team Integy Motor Heatsink for the the Associated RC18T (ASCC2010, ASCC2012).FEATURES: Constructed of alloy, anodized Blue colored finish 10 fin design helps to dissipate heat and prolong motor lifeINCLUDES: One Team Integy Motor Heatsink for the Associated RC10TREQUIRES: Installing over motorSPECS: Diameter: .94" (24mm) Width: .63" (16mm)IntegyPart INTT7600B