Tenive 36" Aerobic Stepper Adjustable Fitness Non-slip Stepper Platform Exercise/Workout Stepper, Adjust 6"-8"-10" Great for all levels workout indoors or outdoors to help for training endurance, strength and improving overall fitness. Sturdy environmental friendly PP materials and advanced injection molding technology insure no harm to human health. Designed with special shock absorbing, non-stick, non-slip platforms to avoid accidents and increase safety Convenient to control intensity of training with 3 settings of adjustable height (6", 8", 10")through the attached risers Portable and lightweight frame easy to transportation and storage