E-Z Foam Squash Balls Rival The new Ultegra Di2 derailleur

The new Ultegra Di2 derailleur now gets all the great design features from Dura-Ace

This ensures that drivetrain parts last longer and perform better

Patented and removable labyrinth water fill-spout for rapid refills without splashing

The Arena Neon one-piece is ideal for wearing during swim training

E-Z Foam Squash Balls Rival The new Ultegra Di2 derailleurDeveloped for kids 3 7 years old, the ball has a big bounce and stays in the air a long time. They are designed to be lightweight, soft and bouncy enough to allow juniors to safely rally with each other (and so parents can rally with their young children too). These balls are specially dimpled to recreate a much truer ball trajectory than a standard foam ball