The RAM-20.503/K is a branded specialist speaker adapter made by Carmedia. It is a 165mm-sized part specifically designed to fit the rear doors of a Fiat Panda. The part is constructed from high-grade materials and gives superior sound performance to most other speaker adapters available. It allows for improved sound quality and bass output, as well as custom styling. The adapter is designed to fit perfectly with the opening of the Fiat Panda rear doors and is easy to install.