Image Item No. Description By  3437  Duplo, Brick 2 x 2 Catalog: Parts: DUPLO, Brick 1  31110  Duplo, Brick 2 x 2 x 2 Catalog: Parts: DUPLO, Brick 1  98252  Duplo, Brick 2 x 3 Slope Curved Inverted Catalog: Parts: DUPLO, Brick 1