External retaining ring 18 mm UNI 7435 (243009, RAVAGLIOLI)
Fits the following equipment:
KPN121, KPN123, KPN124, KPN126, KPN224, KPN225, KPN234, KPN235, KPN245, KPN250, KPN255, KPN304, KPN305, KPN306, KPN312, KPN324, KPN326, KPN327, KPN336, KPN337, KPN341, KPN345, KPN349, KPS224, KPS234, KPS244, KPS305, KPS306, KPX225, KPX312, KPX315