Large Diameter/Underground Conduit Dimensional Reference Chart OEM/Miller, Division of Holm Industries Single Wall A B C *Minimum Wall Thickness Single Wall I.D. O.D. Total Width 1 1/2" in. 01.490 01.770 00.270 mm. 37.846 44.958 06.858 0.020 2" in. 02.045 02.504 00.289 mm. 51.943 63.602 07.341 0.020...