Service Entrance Head, Type Clamp-On, Trade Size 1 Inch, Number of Holes 5, Hole Size (2) 7/16 Inch/(3) 1/2 Inch, Size 3-3/4 Inch L x 2-11/16 Inch W x 3-1/2 Inch H, Material Hot Dip/Mechanically Galvanized Malleable Iron, Approval UL 514B, Used On EMT/Rigid Conduit/IMC Service Entrance, Insulation Material Phenolic, Inclusion Brass Screw