'HOWARD STREET' CUT BLOCK STONE WALL. - HO- Scale. Featuring Dovetail Ends! Matching stone pattern for both single & double stone block portal systems. Overall outside dimensions: 11-3/4"W x 4" H x 3/8" thick HOWARD STREET MASONRY SYSTEM is an integrated system of matching wall, portals & Scale Masonry Components: FL4158 - "Howard St." Seam Sealers FL4159 - HO Single Stone Block Portal FL4260 - HO Double Stone Blck Portal FL4190 - HO Stone Blck Retaing Wings