5Pcs 12V 24V 12mm Waterproof ON Off Latching Push Button Switch with Wiring Harness and Led Indicator Light, Pre-Wired SPDT Self-Locking 4 Pin Marine Metal Switch for Boats Cars Truck (Blue): Amazon.com:
Mini Push Button Switch 4-PIN Qty. 4
Arduino: Pushbutton
NO NC 4 Pin Red Sign Mushroom Momentary Push Button Switch 250V 6A - Walmart.com