The HEW IMP RETROROLL W/45808 ST 18.50 is a precision pulley by Precision Pulley, Inc, designed for high efficiency and reliability. With a diameter of 18.50 inches, it is built to support heavy loads while maintaining precise alignment. This model features a durable construction that adheres to industry standards, ensuring safety and compliance. Its versatile design allows compatibility with various systems, making it suitable for a wide range of industrial applications. The HEW IMP RETROROLL series is known for its exceptional performance, making it a preferred choice for professionals.