The Viper has been redesigned into two new yo-yos. One without hubstacks and the other is this version, the Viper Flux. The Flux is fast and versatile on the string using the new Gecko Pad that is a molded silicone response system that clicks into the silver annodized hub. It also uses the patented Henry's speed bearing system. Outfitted with soft rubber rims the Viper Flux is very durable with many applications including spinning hubs.