The Thomas & Betts floor box service fittings with caps are designed for industrial use, specifically for conduit and tubing installations. Made from brass, these rigid metal fittings provide a secure and durable connection. The service fittings come in a color brass and have a rigid flexibility, making them suitable for a variety of industrial applications. The product number 1728 indicates a specific model within the Thomas & Betts line of floor box service fittings. Set of 4