Cole Hersee Extra Heavy Duty Push Button Switches Noncorrosive construction. Moisture repellent insulators. Brass case, stem, plunger button, terminals, and mounting hardware. Heavy duty construction for 6 thru 36 VDC applications. Bright chrome plated buttons and face nuts, except where noted. Silver contacts. Molded plastic insulator with protective barrier between terminals. Mounting stem 5/8" diameter, 1-3/8" long. Fits panels up through 1" thick.