Conduit Bender Head, EMT Conduit Size - Aluminum and Galvanized Steel 3/4 in, EMT Conduit Size - Stainless Steel Not Applicable, Rigid/IMC Conduit Size 1/2 in, Material Aluminum, Compatible with Grainger Part Number 10F491, Compatible with Manufacturer Model Number 74-019, Accessory Type Bender Head, Includes Convenient Bending Guide