A range of hand exercise therapy putty in a choice of densities that offer different resistances. Tan = super soft, Yellow =soft, Red = medium soft, Green = medium, Blue = firm, Purple = extra firm. These puttys are clean, non toxic, non oily and will leave no colour or residue on the user.The therapy putty will not fragment, separate or stick to the users skin. Ideal for improving strength and function in hands for both children and adults. This putty is designed to be squeezed, stretched, twisted or pinched plus many other strengthening movements defined by a healthcare professional.