The ABB M3SS4-10B is a selector switch operator designed for reliable control in industrial settings. This 22.5 mm, non-metallic unit features a black bezel and a lever-type actuator with three positions, each at a 45° throw. It's a maintained switch, meaning it stays in the selected position until changed. Built tough, the switch meets several NEMA ratings including 1, 3R, 4, 4X, 12, and 13, ensuring it can handle various environmental conditions. If you're looking for a solid, no-nonsense selector switch, this one’s definitely the real deal. Distributed by BSP Automation, the M3SS4-10B is a dependable choice for control panels where durability and precise operation are key.