Set of 4 double-sided geoboards with one side featuring an 11 x 11 pin grid and the other, a circle with 24 pins embossed, on the left, with fractions from 1/24 to 23/24 and, on the right, with degrees in increments of 15. The middle of the circle is recessed, to fit Fraction Circles (not included). Each board includes 24 elastic bands. Sturdy plastic. 20 x 20 cm.