Image Item No. Description By  4865b  Panel 1 x 2 x 1 with Rounded Corners Catalog: Parts: Panel 40  87544  Panel 1 x 2 x 3 with Side Supports - Hollow Studs Catalog: Parts: Panel 16  60581  Panel 1 x 4 x 3 with Side Supports - Hollow Studs Catalog: Parts: Panel 21  59349  Panel 1 x 6 x 5 Catalog: Parts: Panel 7