This Hubbell F-HCT T-Track Tow Trolley is designed for use with 1.25" x 3.50" flat cable. It is a high-quality product that is ideal for use in various industries. The brand, Hubbell, is known for producing reliable and durable electrical equipment and supplies, and this conduit fitting is no exception. The T-track tow trolley is easy to install and provides a secure connection for the flat cable. It is suitable for use in conduit and tubing applications, as well as in the wire, cable, and conduit category. This product is a must-have for anyone who is looking for a reliable and efficient electrical conduit fitting.