This package includes a vinyl record adapter made of aluminum with dimensions of 3.80X3.80X0.80cm. It is designed to replace old or broken 7-inch vinyl record domes, minimizing eccentricity and improving stability for 45 RPM records. The adapter allows for smooth playback and high-quality sound, reducing pitch swing and improving tone arm stability. It is easy to install and offers high performance and reliability. The metal adapter is precise and durable, suitable for playing 7-inch records with no shaking. Overall, this adapter is a professional tool for any turntable user, offering convenience and quality playback.