DESIGN: The Step Club Size Aerobic Platform is a great home-fitness tool for beginners to experts for aerobic and strength exercises Burn more calories the higher you step with 4", 6" & 8" platform heights The risers can be used on any type of indoor flooring from carpet to concrete to hardwood without leaving behind scratches INCLUDES: This set includes a teal nonslip platform Four (4) original risers and streaming videos for limitless workout programs WARRANTY: This product is backed by a 90-day manufacturer's warranty period