✔ Kinetic engine,carbon steel spring turbocharges abdominal and arm workouts<br><br>✔ Ultra-wide wheel,Stabilizes movement to carve left,right, and center<br><br>✔ Performance grips,rubberized non-slip ergonomic grips for staility control <br><br>✔ Foam Knee pad,high density foam for superior comfort<br><br><br><strong>✔ Specification:</strong><br>   Weight: 1500 g<br>   Dimension: 23 x 20 x 22.5 cm<br>   Material: ABS<br><br><br><strong>✔ Package included:</strong><br>   1 x kinetic engine<br>   1 x foam knee pad<br>   2 x hand grips