Specification:

This product is use the non-toxic envirnomental material , and the surface can do any color, it can hit and practise in the limited space, exp: office, home, balcony,the park,and so on, because the weight is so light, it won't damage any products, the packing way is :300pcs in a bag and then in a carton. 

The color and hardness can be customized.

Pictures: