This is the replacment Gear/Wheel Hub for the RJ Speed Pro Stock - RJSC2001, Funny Car - RJSC2002 and Dragster - RJSC2003. FEATURES: Nylon construction, black in color Replaces a worn or damaged hub INCLUDES: One Gear/Wheel Hub REQUIRES: Installation following the model manual COMMENTS: For the set screw hub order RJSC5311 kpm12/12/2007 ir/jxs