Carburetor Plug Screw O-Ring, for both the OEM and aftermarket screw type plugs for Rotax Max Kart Engines. This O-ring helps form a fuel and air-tight seal between the plug screw and carburetor body.
Each O-Ring is sold separate of the plug screw, although it does* come with part 27 when ordered. Dimensions of this O-Ring are 17mm for ID, by 2.5mm in diameter uncompressed.