Image Item No. Description By  70681  Arch 1 x 3 Inverted Catalog: Parts: Arch 1  6005  Arch 1 x 3 x 2 Curved Top Catalog: Parts: Arch 3  18653  Arch 1 x 3 x 2 Inverted Catalog: Parts: Arch 2  6182  Arch 1 x 4 x 2 Catalog: Parts: Arch 2  6060  Arch 1 x 6 x 3 1/3 Curved Top Catalog: Parts: Arch 2