1、Plastic Material: This fractional dice is made of premium plastic material, which is sturdy and wear resistant and can be used for a long time. 2、Engraved Symbols: The surface of the dice is engraved, the numbers on the dice will not wear out and are durable and not easy to fade. 3、Children Intelligence Development: This teaching dice develops children's intelligence for early childhood education, and trains children's ability to calculate fractions. 4、Teaching Tool: This dice can also be used as a classroom teaching tool, which is convenient for teachers to teach mathematical algorithms. 5、20 PCS: This math teaching dice set includes 20pcs dices, enough for a variety of combination algorithms, convenient and fast. 20 x Dice Item Type: Fraction DiceMaterial: PlasticGross Weight: 88g / 3.1ozProduct Size: Approx. 1.6 x 1.6 x 1.6cm / 0.6 x 0.6 x 0.6inApplicable: Mathematics teaching