Use for T-REX450X/XL Removes slop associated with elevator in all kits but CDE. Not compatible/necessary with CDE XL kit. Mixing arm x 1 Ball link(long) x 4 Linkage rod(F1.3x37) x 1 Linkage rod(F1.3x32) x 1 Short linkage ball x 2 Collar screw(M2x15) x 1 Cross screw(M2x12) x 1 Bearing MR52ZZ x 2 Washer(F2x3.8x1) x 1 Washer(F2x3.8x0.2) x 1 Installation Picture: