16 x 16 x 4 inches anti-slip platform: slip-resistant, shock-absorbing high step aerobic platform with four additional removable 16�� x 16” x 2” risers provide a steady, safe, space-efficient and comfortable step workout experience Easy height adjustment: increase workout difficulty and tweak your aerobic exercise routine according to your fitness level by adjusting platform height from 4” up to 12” using 4 additional stackable risers High-density polyethylene material: constructed of recyclable, high-quality polyethylene material, yes4all high step aerobic platform can support up to 275 pounds, suitable for both low and high-impact step exercises Convenient transportation: lightweight, compact and easy to install, you can take yes4all high step aerobic platform to your commercial gym, your workplace or your home Multiple benefits: offers you a multitude of health benefits such as helping you burn fat, lose weight, tone and retain your body as well as improving your cardio