Sunny Health & Fitness Deluxe Aerobic Step Non-slip 14" x 39" stepping surface Adjustable height from 4" to 6" to 8" Durable stepper fitness tool is excellent for engaging a full body workout. Supports up to 200 lbs The aerobic stepper is compact and portable. Each support block is 2"H x 16"W x 16"L Improve balance, strength and health by utilizing the dynamic aerobic stepper. This stepper will withstand tough workouts like mountain climbers, pushups, and stepping routines.