Construction : Steel And Aluminum Centerline Bend Radius : 2-21/32” (67.500 MM) – 7-3/8” (187.300 MM) (IMC) for 1/2” – 1-1/4” Shoe Size, 2-21/32” (67.500 MM) – 9.000” (228.600 MM) (Rigid) for 1/2” – 1-1/2” Shoe Size Conduit Size : 1/2″ Through 1 1/4″ IMC1/2″ Through 1 1/2″ Rigid steel, aluminum, & stainless steel Conduit Type : Mechanical Bender Conduit Type : EMT, IMC, Rigid Application : Conduit Bending Replacement Part : 1818G1 Frame And Undercarriage Unit Only, 19988G Wheel, Non-flat