Fitness & Sport Enthusiasts : Strengthen your wrists, improve finger dexterity, and increase hand strength while reducing fatigue with this grip strength trainer. Perfect gifts for athletes, musicians, rock climbers, weightlifters, martial artists, and individuals recovering from hand injuries or surgery. Colour:black Material:PP Size: 16.5 x 11.5 x 2.2CM Package Contents: 1 x Finger Exerciser 1 x Hand Grip Strengthener 1 x Hand Extension Exerciser 1 x Stress Relief Ball 1 x Forearm Workout Ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.