Description 40 DCOE 18k Genuine Weber carburettor   Historic 40 DCOE 18 K model   Supplied with the following calibration:   Venturi              32mm Aux Venturi        3.5 Main Jet            125 Air Corrector      220 Emulsion Tube    F11 Idle Jet             50F11 Pump Jet           45 Pump Spill          50   These give the period look and are ideal replacement for older cars with OE Weber carburettors such as the Lotus TwinCam     Progression wells have plugs instead of screws   Has no idle air bypass screws   Has spring retained Auxilliary Venturis   Has no raised galleries on the top cover   Does not say Made in Spain on the top cover JD 1955012200