Unique to the Graziozo saddle is the replaceable Insertz® in the cup. This way you can choose from the most beautiful designs and you can customize your saddle yourself. This way you always have a new look of your beautiful product. This Insertz@ is made of high quality materials and has a unique magnetic connection plate for a strong and easy connection to your saddle. The Altara Flake Steel is an Insertz® where the steel is sprayed with a Flake finish.