This non-oily, bleedproof specialty putty provides patients with visual feedback as exercises are performed.
Squeezing, stretching or pinching the putty creates a gradual color change as putty’s temperature increases. Putty will slowly revert back to original color. When not in use. colors/Resistances include:orang - yellow (soft), purple-red (medium-soft), and royal blue-light blue(medium). later free.