Features： 1、Non Slip Particle: Surface non slip particles, with massage effect. Conform to ergonomic design, easy to hold and operate, bring you convenience. 2、30lb Grip Strength: Helps treat hand cramps, arthritis and stroke, grip strength is 14kg / 30lb, for initial training or exercise for middle school students. 3、Washable And Practical: Easy to clean, can be washed with clean water, simply rinse off surface stains. Bright color, simple and elegant, beautiful and practical. 4、TPR Material: Finger exercise ring is made of good TPR material, safe and eco friendly, odorless and high resilience, wear resistant and durable for use. 5、Multiple Applicable Place: Light weight and compact, easy to store and carry, can be easily put into your bag, suitable for home, office, school and other places. Specification： Item Type: Finger Exerciser Material: TPR Grip Strength: 14kg / 30lb Size: Approx. 9.5 x 9.5 x 1.9cm / 3.7 x 3.7 x 0.7in Applicable Symptoms: Initial training or exercise for middle school students Efficacy: The finger training device for adults is a physical therapy ring for treating hand spasms, arthritis and stroke, a pressure ring for mobile phone and computer enthusiasts, and a squeeze ring for people with ADHD. Package List： 1 x Finger Exerciser