Inflatable Gymnastic Mat Air Track Tumbling Mat 6.6ft 10ft 13ft 16ft 20ft 4/8 Inch Thick Air Mat Tumble Track Air Barrel Gymnastics Roller with Electric Air Pump. ?? SIZE REFERENCE? : The gymnastics barrel back handspring trainer has 2 sizes: 31.5in (diameter)40in(L) fit for tall 4.5ft and up; 23.6(diameter)40(L) fit tall below 4.5ft. Choose the proper gymnastics roller barrel for your kids. ?? Wide APPLICATION? : The air roller gymnastics barrel assist your kids in doing back handspring and backflip easily, stretching and bounce training. Practical rolling barrel for gymnastics for kids training home, dance, cheer, or yoga, taekwondo. ?? COMFORTABLE & SAFE? : This gymnastic air barrel mat is very comfortable when you doing gymnastics or practice tumbling, back handspring, it is high resilience and it can protect you from hurt when doing exercise. ?? EASILY INFLATE & DEFLATE? : This tumbling air roller is equipped with a 600w electric air pump and repair kit, it will take less time to inflate and deflate, and maintains the pressure for days. The repair kit can better help tighten the roller barrel valves and deflate easily. ?? EASY TO CARRY & CLEAN-UP? : This lightweight gymnastics roller barrel has carrying handles, making the inflatable barrel tumbler easy to carry out and set up on any floor. The vinyl surface resists tearing and is easy clean with a simple soap and water solution. DOBESTS AIR ROLLER BARREL GYMNASTICS BACK HANDSPRING TRAINER. DOBESTS Inflatable Back Handspring Trainer For Gymnastics Tumbling Air Roller Barrel Back Handspring Assist. Keep Air Pressure For Days, No Leak. Weight Capacity > 300 LBS. The Tumber Barrel Has 2 Sizes: 23.6in diameter / 31.5in diameter. 31.5in (diameter) back handspring trainer gymnastics roller barrel is more fit for kids height 4.7ft and up. 23.6 In (diameter) back handspring trainer gymnastics roller barrel is more fit for kids height 4.5ft and below. The air roller gymnastics barrel has 2 sizes. Both of them are 40in long. Keep Air Pressure For Days. It is normal for a little air leakage to occur after prolonged use. Isolated From The Dust. Special Design, Not Easy To Lost. Air Track & Air Barrel. Air track & air barrel set is perfect. Assist training back handspring. Protect from injure when tumbling. 4.6 out of 5 stars.