Color Marking Rings (Series FU) are essential accessories for STAUFF Quick Release Couplings, specifically designed for the Series FU Carbon Steel Flat-Face Push-to-Connect Couplings. These rings provide a simple yet effective way to visually distinguish between different lines or systems, enhancing safety and operational efficiency. Available in various colors, they can be easily installed on the couplings to facilitate quick identification and organization in industrial settings. By using Color Marking Rings (Series FU), you ensure clear visibility and easy management of your fluid handling systems, making them an indispensable tool for professionals working with STAUFF's Carbon Steel Quick Release Couplings.