#WT159 Stacking RingsAbout ProductTen graduated size discs may be arranged,capped by a tight ball top with o-ring inside to add an additional manipulative element. Size & AgesSize W3 1⁄2” x L 3 1⁄2” x HT 8 3⁄4” ( 9 x 9 x 22 cm.) Ages 18 Months+
