The 'SHIM ST.MOTOR B.SCHILD CIT.0.3' is a thin spacer designed for Citroën 11CV and 15CV models. This shim, with a thickness of 0.3 mm, is used in the starter motor housing to precisely adjust the internal components. It helps reduce wear and friction within the mechanism, contributing to the vehicle's effective operation due to its specificity. This component is essential for the maintenance and restoration of classic Citroën vehicles, extending the starter motor's lifespan.