PRODUCTFinger Strengthener black 10LB, gray 6.6LB; Grip strength trainers black 50LB, gray 30LB. EXERCISE ANYTIME AND ANYWHEREFinger grip strengthener is small and portable, you can put it in your pocket. You can use them anytime and anywhere (home, office, bus, plane, train, on the road, traveling, walking the dog, walking, anytime you want to exercise). COMFORTABLE AND DURABLEThe hand and finger strengthener is made of high quality silicone material with good elastic, suitable for small and large hands, teenagers, adult men women and the elderly. Durable for long term use. SUITABLE FOR EVERYONEFinger Exerciser is great for improving finger strength and dexterity. Climbers, athletes, musician or just about everyone can improve grip, finger dexterity and strength. GREAT GIFT IDEAGreat for anyone. Perfect gift for athletes, musician, family and friends. Anyone can easily use it anywhere. Specification: Material: Silicone Size Chart: Finger Strengthener5.5cmx9cm/2.17inchx3.54inch Package Includes: 1Finger Strengthener+1 Grip strength trainers Note: Please allow slightly errors due to manual measurement and different monitors.