Contents: - 1 board (20,5 x 20,5 cm) - fractions segments (1, 1/2, 1/3, 1/4, 1/5, 1/6, 1/8, 1/10, 1/12, 1/24) - 2 packs of rubber bands One side of the base board has a circular recess (Ø 10 cm) to put in the fraction segments and pins for the rubber bands. The fractions and the degrees are printed on the board. The reverse of the board has 121 (11 x 11) pins for geometrical use.