Colour Marking Rings are essential accessories for Series FC Carbon Steel Flat-Face Push-to-Connect Couplings. These rings provide a visual identification system, enhancing safety and efficiency in fluid handling systems. Designed for use with STAUFF Quick Release Couplings, they ensure quick and accurate connection recognition. Available in various colors, these rings allow for easy customization and organization of your coupling system, making them indispensable for professionals working with carbon steel quick release couplings.