Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 11170 Duplo Brick 2 x 2 x 1 1/2 with Curved Top this part is a print of it
• 11170pr0021 Duplo Brick 2 x 2 x 1 1/2 with Curved Top, Rainbow on Left Side, Rain Cloud on Right Side Print this part is a pair of it