Large size idle jet, fits Weber 32/36 and 38/38 carburetor models. Helps regulate fuel flow at idle. A common upgrade, when Opel 1.9L engines are rebuilt for higher performance (such as installation of 2.0L pistons or higher-lift camshafts). Fits part #9069 larger-size idle jet holder (with 11mm diameter head and M8 x 1.0 threads). Specify jet size needed: 050, 055, 060, 065, 070, or 075