Omron Safety (Sti) - D4N-2120 - Limit Switches Safety G1/2 1NC/1NO Roller Lever Actuator, D4N Series - Allied Electronics & Automation, part of RS Group
1-pk D4N-2187 Limit Switch Replacement for Omron | eBay
D4N-4120-NPT Omron STI | Small Safety Limit Switch | Valin