The counting frame comes in two parts - the front is printed with numbered circles 1-20 and fits together, the back has blank circles and you can use one part only for a 10 frame or both together for a 20 frame. Dry-wipe markers can be used to write in the blank circles. Includes 22 counters (Ø 2.5cm) and 10 arithmetic symbols (+ - = < >). The counters are made from high quality recycled plastic and at 0.4cm thickness RE-Plastic® is 100% post-consumer recycled plastic which is 100% recyclable again. Small parts - not suitable for children under 3 years