1TL1-3, MS24523-23. 1TL1-3 is an environmentally sealed military grade toggle switch. 1 pole, 2 position, screw terminals, standard lever. The 1IL1-3 has SPDT ON-NONE-ON circuitry and is mil spec to MS24523-23. Because of our buying power we are offering these at a special price to you on this popular toggle switch. Features ON-NONE-ON circuitry.