P3-71111W pushbutton switch from OTTO Controls is a rugged push button switch is watertight sealed to IP68S! It has 2.5 lbs operating force, normally open , positive tactile feedback, red button, solder terminals. Makes and breaks every time! Less than 25 milliohms contact resistance because the OTTO design features inherent rocking action that breaks welds and wipes contacts clean. The P3 is the commercial version of the P1 Pushbutton switch, offering vastly improved life under extreme conditions found in some industrial environments. The pushbutton on the P3-71111W is sealed by a silicone boot operating on our patented “rolling sleeve”, providing longer life and smoother operation over a wide temperature range.