An ultra-thin module covered in Carbon fiber allows for the creation of a sleek temporary G-STEEL piece with the slimmest profile to date. Strong and lightweight, the Carbon Core Guard structure absorbs external shock and maintains Bluetooth connectivity and solar charging functionality even with smaller components and a thinner module. The GST-B400 measures just 12.9mm from the case back to the top of the bezel. That is to say, it is more than a millimeter thinner than its predecessor model. You can choose from four different styles: the simplicity of a silver metal strap and silver case, the light silver case contrasted with a dark resin strap, the dial in a dramatic red vapor tank finish paired with an ion-plated bezel. blacks or the dial in a striking blue vapor tank finish with a black ion-plated bezel and strap. The upper bezels are treated with five different finishes and the central ones with four; There is no doubt that G-STEEL watches have exceptional metal textures from every angle. 

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