The Allen Bradley Type 13,4,4X 250V Stack Light Tower Base Unit 855T-BPM10 is a high-quality industrial automation accessory designed for use in signal towers. Manufactured by Allen-Bradley in Austria, this wiring base unit is a reliable and durable component for indicating and signaling systems. With its sturdy construction and specific model number, this stack light tower base unit is a dependable choice for industrial automation and motion control applications.