Accurail 4599 HO Scale 40' Single Sheathed Wood Boxcar Kit Oxide Data Only Accurail 4599 HO Scale 40' Single Sheathed Wood Boxcar Kit Oxide Data Only This easy-to-assemble Accurail HO Scale 40' Single-Sheathed Wood Boxcar with Steel Doors and Steel Ends kit is based on cars built from the early 1900s and used into the 1950s.