Image Item No. Description  30528  Arch 1 x 8 x 6 (Portal) Catalog: Parts: Arch  6184  Arch 1 x 12 x 5 Curved Top Catalog: Parts: Arch  30613  Arch 3 x 6 x 5 Ornamented Catalog: Parts: Arch  30272  Arch 4 x 12 x 6 Wall with Channels Catalog: Parts: Arch