Camdenboss din rail mounting module kits camdenboss cnmb4kit the camdenboss din rail mounting boxes cnmb4 are from a range of module boxes designed to din 43880 manufactured in grey polycarbonate ul 94v 0 flame retardant material these are complete kits of the cnmb boxes including terminal guards and panel covers camdenboss cnmb4kit din rail mounting boxes cnmb4