What's the middle distance?

15cm rubber band is used for short and medium stretching. Rubber bands are the favorite of slingshot lovers, and different slingshot lovers like different types of rubber bands. Both circular rubber bands and flat rubber bands are considered as short draw distance, medium draw distance and long draw distance, and are subdivided into medium short draw distance and medium long draw distance. The pumping distance is short, the rubber band length is generally around 10 cm, the middle pumping distance is basically around 20 cm, and the long pumping distance is above 30 cm. As for the short and medium distance, it is 15cm.