Original 4 x SPH 4 Helmet Retention Assemblys with Ear Cups

This is a set of 4 x SPH 4 original Helmet Retention Assemblys with ear cups, used but good to very good condition , Unfortunately, sizes are unknown,ideal for restoration objects ,no individual sale, only as a set, note that all our items are pure collector items or display items. The items are not tested for real use and have no aeronautical exams or clearances. Use is at your own risk !