Our high quality, smooth-turning speed skipping rope is recommended for general purpose skipping. Made of solid vinyl cord with free-spinning, easy grip low density shatter-proof polyethylene handles, these are the most durable speed-style ropes available. The cord is regularly tested by an independent research laboratory to ensure maximum flexure fatigue resistance. Product Details: 8ft: Suitable for heights under 5ft 4\" 9ft: Suitable for heights between 5ft 4\" and 5ft 10\" 10ft: Suitable for heights over 5ft 11\" SPECIFICATION: Brand Fitness Mad Usage Home Use, Commercial Use Condition Brand New Warranty 12 Month Warranty