Specification 100% new and high quality MaterialABS + TPE ColorMulti-color optional Size16.5X9.5X thick 3CM Features: Comfortable rubber non-slip handles and top quality design with stainless steel extension springs. Durable and safe, it will not damage your hands and fingers. The Hand Gripper is ergonomically designed and suitable for all age groups and any hand sizes. Adjustable Resistance: Easily adjust resistance from 10 lb. to 110 lb.to fit any training level, beginners to advanced. Perfect for rock climbers, bodybuilders, golfers, surfers, tennis players, drummers, guitarists, pianists, massage therapists, baseball players and violin players. Also beneficial for people who have arthritis, tennis elbow, rheumatoid arthritis, and carpal tunnel syndrome. Package include : 1 x Hand Gripper Note There is 2-3% difference according to manual measurement. Please check the measurement chart carefully before you buy the item. Please note that slight color difference should be acceptable due to the light and screen.