Application: AB Roller Coaster
Function: Legs
Model Number: Roller Wheel Abdominal Muscle Trainer Wheel
Type: Single-Wheeled
Ten minutes a day: 6 levels of force can be adjusted
function A: eight pack abs, arm muscle lines, latissimus dorsi
function B: have thin arms, breast enlargement, thin waist, abdomen
material: latex, good elasticity, strong