Fangrui Product Details Description: Helps Children Stay Focused- Our Wobble Seat Helps Absorb Kids' Energy And Allows Them To Sit Still For Long Periods And Stay Focused In The Classroom. Effectively Helps Children Stay Focused While Reading At The Desk And Eating At The Dining Table, So That They Can Sit Still Comfortably. Relieves Back Pain & Improves Posture- Placing The Wobble Board On The Office Chair Can Prevent You From Sitting In The Same Posture All The Time To Relieve Back Pain And Improve Posture, Making You More Energetic. Improves Balance & Core Strength- Use Our Balance Disk During Exercises Such As Standing On The Balancing Pod, And It Can Strengthen Your Core Muscles And Improve Your Balance, Coordination, And Flexibility. And The Non-slip Grip Can Decrease The Chance Of Ankle And Knee Injuries During Workouts. Inflation Pump Included- The Balance Disc Is 34cm/13.4in In Diameter, And The Maximum Weight Limit Is 450 Lb. Includes An Easy-inflation Pump, You Can Inflate To Different Degrees Of Fullness To Adjust It To Ideal Heights. Specifications: Specification: Item: Explosion-proof Yoga Balance Mat Material: Pvc Color: Black, Pink, Blue, Purple, Green, Grey Size: 330x330x10mm/12.99x12.99x0.39in Net Weight: 850g Gross Weight: 850g Package Included: 1*yoga Balance Mat 1*inflator 1*inflation Needle