The 1M31T1B1M1QE is a three-pole double-throw (3PDT) miniature Toggle Switch with solder lug termination, ON-NONE-ON function, 10.41-inch high chrome plated brass actuator, 8.89-inch high keyway (THD standard) nickel plated brass bushing. The 1M31 series switch has silver plated contact, stainless steel housing and tin plated brass switch support.