Minerallac® Minerallac Traditional® Conduit Strap, 2-Hole, 1 in Conduit, Surface Mount, For Use With: 1 in Rigid/IMC Conduit and 4/0 SER Cable, Silver Color, 0.035 in THK, 3/16 in Mounting Hole OC, Steel, Pre-Galvanized, 3.14 in L x 0.75 in W x 1.33 in H