1. KLB Sport 31" Adjustable Workout Aerobic Stepper In Fitness & Exercise (Click Link to Check Price on Amazon)
Editor's Rating : 9.5 out of 10
Great for workout classes and regular home use, you can work out anywhere in your home, office or take it with you to your friends' home!Adjustable heights: 4" to 6" to 8"

2. Sunny Health and Fitness Adjustable Twist Stepper, Pink (Click Link to Check Price on Amazon)
Editor's Rating : 9.5 out of 10
Twist action moves up and down and side to side which helps to tone buttocks and thighsAdjustable resistance

3. TMS 30" Aerobic Step Aerobics Trainer Adjustable Exercise Fitness Workout Stepper (Click Link to Check Price on Amazon)
Editor's Rating : 9 out of 10
Condition: Brand New,Color: Black+Gray+Red.Material: PVC.This 30'' exercise stepper will help you work on your coordination as you improve your cardiovascular fitness.The secure, non-slip surface can ensure you exercise easily and safely. Our aerobic step can be used to target your hamstrings with alternating lunges and also help you to strengthen your chest and back by pushups. Height is adjustable from 4'', 6'', and 8''. Ideal for cardio workout or to strengthen your lower body.

4. Soozier 28" Aerobic Stepper Fitness Platform - Adjustable 5" - 7" - 9" (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10
Heavy-duty polypropylene material and advanced injection molding technologyIdeal for cardio workout and/or to strengthen your lower body

5. Soozier 30" Aerobic Step / Fitness Stepper w/ Adjustable Risers (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10
Easy to maintain and keep cleanHeavy-duty polypropylene material gives the stepper a high 550 lb weight capacity