[SUPERIOR-QUALITY DESIGN FOR MAXIMUM PERFORMANCE - SAFE AND ]- Hand grip strengthener made of and top-quality silicone, not easy to break, to bring customers stable experience. [6 Level Resistance]- Upgraded hand strengthener for more resistance, the different colors have an obviously different tension/strength. The textured adds more sensory input than traditional stress balls. [IMPROVE YOUR GRIP STRENGTH] - Hand grip strengthener is perfect for improving grip strength, power in the wrists and hand, helps to reduce muscle stiffness, injury rehabilitation, relieve stress and increase . Great for Rock Climbers, Tennis Players, Athlete and Musicians. [FITS ALL HAND SIZES & PORTABLE DESIGN] - Suitable for all age groups and fits well for all hand sizes. Portable and easy to fit in bag or pocket. You can start grip training anytime and anywhere. Package: Glacier Blue 10-20LB x 1+Light Luxury Green 20-30LB x 1+Rhythmic 30-40LB x 1+ Pink 40-50LB x 1+Light Smoke Gray 50-60LB x 1 Colour:blue+green++pink+grey Material:Silica gel Package Contents: 5 x Grip 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.