'HOWARD STREET' SEAM SEALERS - Additional seam sealers for joining continuous walls end to end or to other components. Simply glue into position with 'Super Glue'. Sold in sets of 3. Each 4-1/4" H x 3/4" W x 1/4" thick. HOWARD STREET 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; and FL4190 - HO Stone Blck Retaing Wings.