Thank you for viewing! ♡ ark Powerball Gyro Ball Twist Ball Auto Start Wrist Strengthening Snap Ball Grip Strength Muscle Training Training Dumbbell Sports Forearm 70mm x 55mm 48-17 07-13 Warehouse 2 \\Various items on sale// #Chon'sShopList 【Instant purchase OK!】 ※Free shipping ♪(*´˘`*)♡ Please understand that these items are stored at home before purchasing ( ⁎ᵕᴗᵕ⁎ ) Since I have received many items from others, some of them may not have been tested for functionality (;_;) If there are any problems, I will handle them properly!! Please check the actual photos for the condition of the product (*^^*) ⚠️To prevent complaints, please read the profile. ♡o。 ..:*♡o。 ..:*♡o。 ..:*♡o。 ..:*♡o。 ..:* A training ball developed with the idea of using the centrifugal force of a rotor that rotates at high speed to train arm muscles and grip strength. Equipped with an auto-start function 260g 70 x 70 x 55 (CM) With instruction manual ♡o。 ..:*♡o。 ..:*♡o。 ..:*♡o。 ..:*♡o。 ..:*