Patented design improves on the already ingenious Haas ascent system by giving you an additional 18" of bungee in the system for a total of 30". Designed to maximize friction reduction with a bungee that terminates at the top of the velox, travels down the channel to the bottom where it wraps around a shiv with stainless steel sealed bearings inside a machined aluminum block. U.S. Patents no.9, 352, 190 and no.9, 643, 054; European patent no.2994202.