FlexEx Patented Hand Exerciser - Original, Made in USA Hand Grip Strengthener, for Physical Therapy, Musicians and AthletesThis FlexEx package contains 1 blue (hard), 1 red (medium) and 1 yellow (soft) part (3 parts total). FlexEx is a simple, easy to use finger, hand and forearm exerciser for Computer Users, Sportsmen, Musicians, Tennis/Golfers, C..