Flush-mounted switch mechanisms:. . 790-3016 = 1 gang 2 way rocker switch mechanism (2000/6 US). 790-3010 = 1 gang 2 way + neutral rocker switch mechanism (2000/6 USK). 790-3029 = 2 gang 1 way rocker switch mechanism (2000/5 US). 790-3022 = 1 gang interme