This mounting kit is required to mount Dellorto carburettor with plug connection (use with rubber) or clamp connection 24mm (use without rubber) on the original intake manifold. Contents: Adapter, connecting rubber, clamps and screws. When installing Kymco SF10 engines (horizontal cylinders), the Malossi mounting flange is also required as it has a larger hole spacing compared to the supplied flange. The connecting flange has an inner diameter of 17,5mm. Dimension rubber: Diameter inside: 23mm Outside diameter: 40mm Length: 38mm