The E1161 is a great example of of a robust limit switch with a delrin roller lever actuator. Completely made of high grade stainless steel it is truly waterproof, and completely customizable with almost countless mounting and actuator combinations available. This switch can be desgined to meet operational standards for military use (B2 series) as well as heavy duty industrial applications (B3 thru B9 series). Parameters such as travel length, current rating, and electromechanical endurance are customizable. CPI has acheived endurance qualifications over 5 million cycles with this basic roller limit switch design.