Color Marking Rings (Series FU) are essential accessories for STAUFF Quick Release Couplings, specifically designed for the Carbon Steel Flat-Face Push-to-Connect Couplings in the Series FU range. These rings provide a visual identification system, allowing users to easily distinguish between different couplings in industrial applications. Made from durable materials, the Color Marking Rings ensure long-lasting performance and resistance to harsh environments. They are an integral part of the Series FU accessories, enhancing safety and efficiency by enabling quick and accurate coupling identification.