Image Item No. Description  6541  Technic, Brick 1 x 1 with Hole Catalog: Parts: Technic, Brick  2991  Technic, Brick 1 x 2 - 1 x 2 Angled with Bumper Holder Catalog: Parts: Technic, Brick  2989  Technic, Brick 1 x 4 with Bumper Holder Catalog: Parts: Technic, Brick