This is the Carling Technlogies Contura II sealed toggle switch used to operate ARB air lockers. These patented IP66/IP68 certified toggle switches have a dual seal to keep dust and water out, are made from a strong impact resistant polymer, and can withstand extreme temperatures from -14° F (-40° C) to 185° F (85° C).

These switches are rated for 20 amps @ 12 vdc (or 240 watts continuous).

Full manufacture specifications:
http://www.carlingtech.com/pdf/CarlingSW_V2_3.pdf

Circuit Diagrams:
http://www.carlingtech.com/pdf/v_seriescontcircuitdiag.pdf