Traxxas 5247 Carburetor O-Ring and Seal Set (2.5, 2.5R) Carburetor O-ring and seal set Includes O-rings: 2x1mm (3), 10x1mm (4), 2.5x1.15mm (2), 6.2x1.2mm (1)/ 5x.9mm Comes with O-ring installation tool/ 5.3x7.8x.6mm crush washer (2)/ carburetor dust boot (1) For TRX 2.5, 2.5R Use Traxxas stock and hop-up replacement parts to get the most out of you Traxxas RTR vehicles This product is made from high quality materials and designed for lasting performance This is for use on RC vehicles, consult your user's manual for exact parts listings