This is an ethanol resistant Carburetor Float measures (1.5") includes Gasket   If you want the brass style as original see CD3247 This is the float chamber float for all cars from 1963 to...

Carburetor Float measures (1.5") includes Gasket  This is the float chamber float for all cars from 1963 to 1977. Rolls started to fit a smaller diameter float to the Series 3 Silver Cloud...

This is the spring and filter assembly in the top of the carburetor float lid. 1955-1965 Silver Cloud I,II,III & S-series, Phantom V 1966-1968 Shadow & Bentley T (up to VIN 8741)