Image Item No. Description  20310  Brick, Modified 1 x 1 with Scroll with Hollow Stud Catalog: Parts: Brick, Modified  15411  Brick, Modified 1 x 1 with Stud on Side and Conductive Element on Opposite Side (AppBrick) Catalog: Parts: Brick, Modified  44865  Brick, Modified 1 x 2 with Pin and Bottom Stud Holder Catalog: Parts: Brick, Modified  18892  Brick, Modified 2 x 4 with Wheels Holder with 2 x 2 Cutout and Hole Catalog: Parts: Brick, Modified  18922  Brick, Modified 8 x 16 x 2/3 with 1 x 4 Indentations and 1 x 4 Plate Catalog: Parts: Brick, Modified