D4NL-4GDG-B4Brand: OmronMPN: D4NL-4GDG-B4Guard lock safety-door switch, D4NL, M20, 3NC + 1NC/1NO (slow-action), head: Metal, 24-VDC solenoid lock/mechanical release, 10 to 115 VAC/VDC, Special release Request a quote