Colour Marking Rings (Series FG) are essential accessories for STAUFF Quick Release Couplings, specifically designed for Carbon Steel Flat-Face Screw-to-Connect Couplings within the Series FG. These rings provide a practical solution for identifying and organizing different couplings in industrial applications. Made from durable materials, the Colour Marking Rings ensure long-lasting performance and easy visibility, enhancing safety and efficiency in the workplace. They are an integral part of the Series FG accessories, offering a simple yet effective way to manage and distinguish between various couplings.