Image Item No. Description By  38583  Arch 1 x 2 Jumper Catalog: Parts: Arch 2  6005  Arch 1 x 3 x 2 Curved Top Catalog: Parts: Arch 2  6182  Arch 1 x 4 x 2 Catalog: Parts: Arch 8  92950  Arch 1 x 6 Raised Arch Catalog: Parts: Arch 1  15254  Arch 1 x 6 x 2 - Medium Thick Top without Reinforced Underside Catalog: Parts: Arch 2  3307  Arch 1 x 6 x 2 - Thick Top with Reinforced Underside Catalog: Parts: Arch 1  6183  Arch 1 x 6 x 2 Curved Top Catalog: Parts: Arch 8  6060  Arch 1 x 6 x 3 1/3 Curved Top Catalog: Parts: Arch 2