EDIFICE SLIM series with Sapphire Crystal | A slim, sporty EFR-S572 series chronograph. Although multi-hand chronograph cases tend to be thick, the case of this model was kept to a thickness of 9.1 mm to ensure a good fit. The bezel is designed to look like an automobile brake rotor with slits. Uses a scratch-resistant sapphire crystal. The case and band have a black ion plate finish that resists scratching.