Brass Press Coupling with a corrosion-resistant surface with stainless steel press cap for DHW and radiator systems, stop ring, pressure indicator, color code, guaranteed leaking if not pressed. Calibration-free. Cylindrical external thread according to EN 10226-1 for packing. Only to be used with Uponor MLC, Uni Pipe Plus and Metallic Pipe Plus pipes and with Uponor approved press tool.