Cover, Hub Size (In.) 1-1/2, Screw In, Stamped Steel, Fits Appleton Form 35 Unilet Conduit Outlet Bodies, UL 514A, UL 514B, C22.2 18.3, Includes Stainless Steel Screws Appleton Conduit BodiesFlat-back models provide greater cubic content for easier wire pulling, and additional room for splicing. Fit flush and snug against flat surfaces for stable installation. 1-1/4" and larger Style C and LB Malleable-Iron models feature built-in pulling rollers that eliminate damage when cable is pulled through hubs.UL Listed and CSA Certified.