Yes4All Dual Ab Wheel Dual wheels for greater stability Colour: Blue/White Assembles in less than 1 minutes Shipping weight is 2 lbs Strengthen and tone your upper and lower abs Target your arms, back, hip flexors &amp; obliques Engage several groups of muscle at once Get rid of lower back pain Build up strength, stamina, flexibility &amp; balance Improve your overall health and fitness Manage your weight gain and reduce risks of injury Material: Plastic wheels with steel bar Dimensions: <span class="a-text-bold">Wheels (7.3-inch diameter)</span>; <span class="a-text-bold">bar (9.7-inch length)</span> Colors: <span class="a-text-bold">Red, Blue, Black, and Classic Black </span> Weight: <span class="a-text-bold">1.3 lbs</span> Material: Plastic wheels with steel bar Dimensions: <span class="a-text-bold">Wheels (7.3-inch diameter)</span>; <span class="a-text-bold">bar (9.7-inch length)</span> Colors: <span class="a-text-bold">Red, Blue, Black, and Classic Black </span> Weight: <span class="a-text-bold">1.3 lbs</span> Material: Plastic wheels with steel bar Dimensions: <span class="a-text-bold">Wheels (7.3-inch diameter)</span>; <span class="a-text-bold">bar (9.7-inch length)</span> Colors: <span class="a-text-bold">Red, Blue, Black, and Classic Black </span> Weight: <span class="a-text-bold">1.3 lbs</span> Material: Plastic wheels with steel bar Dimensions: <span class="a-text-bold">Wheels (7.3-inch diameter)</span>; <span class="a-text-bold">bar (9.7-inch length)</span> Colors:<span class="a-text-bold"> Red, Blue, Black, and Classic Black </span> Weight: <span class="a-text-bold">1.3 lbs</span>