hand exercise material is the standard in resistive hand exercise material. Color-coded putty has a different consistency ranging from xx-soft for strengthening the weakest grasp to extra-firm. #71-0060-Tan 10/Bx #71-0061-Yellow 10/Bx #71-0062-Red 10/Bx #71-0063-Green 10/Bx #71-0064-Blue 10/Bx #71-0065-Black 10/Bx #71-0050-Set 10 of Each Color Latex Free UNSPSC#42251600