With extra structural reinforcement of the risers and platform, our design of Aerobic Stepper is the new standard for commercial gyms. Featuring snap lock pins to safely secure risers, the stepper platform is strong and stable. The SMAI aeorbic stepper is a high-quality commercial-grade stepper. Specifications: Commercial grade heavy duty PVC with non-slip rubber top Includes 1 x Platform and 4 x Risers No assembly required weight capacity of 250kg Platform: 110cm (L) x 42cm (W) x 10cm (H) Riser