Image Item No. Description  4733  Brick, Modified 1 x 1 with Studs on 4 Sides Catalog: Parts: Brick, Modified  2628  Brick, Modified 8 x 8 x 2/3 with 1 x 4 Indentations Catalog: Parts: Brick, Modified  2612  Brick, Modified Corner 16 x 16 x 2/3 with 7 x 7 Inside Corner and 1 x 4 Side Indentations Catalog: Parts: Brick, Modified