Marinco Contour 1100 Series Double Interior Switch - On/Off - Black - 1101-BKMarinco Contour 1100 Series Double Interior Switch On Off Black 1101 BK Contour 1100 Series Double Interior Switch On Off Black The Contour Interior Switch can be either surface or recess mounted. The interior series is supplied standard with a three terminal on on switch which can be used for on off circuits or two way light installations. For applications such as shower drain pumps or electric toilets, momentary switches can be interchanged into the