Image Item No. Description By  65217c01  Magnet Brick 4 x 4 x 1 1/3 No Studs and 2 Pin Holes Catalog: Parts: Magnet 379  65209c01  Magnet Brick, Round 4 x 4 x 2 with 3 Pin Holes Catalog: Parts: Magnet 1  73092  Magnet Cylindrical Catalog: Parts: Magnet 45  30159  Magnet Holder Plate 2 x 2 Bottom with Hole Catalog: Parts: Magnet 2  2609a  Magnet Holder Tile 2 x 2 - Short Arms Catalog: Parts: Magnet 5