A-B Rockwell Automation 440P-ARPS11D4. Safety Limit Switches, Metal Compact Style, Full Sw Head Body, Roller Plunger, 2 Circuits, Quick Disconnect, Snap Acting, 1 Normally Ope n Contact, 1 Normally Closed Contact, Standard Contacts, 2C Low Temp Limit, 70C High Temp Limit, Spring Return, DC Micro