Eye squash strings come in a few different varieties. They are all called “Eye X.Tech”.
Eye X.Tech Green
The Eye X.Tech Green has a bit more control and grip. It comes in three different gauges. As with most squash strings, the thinner the gauge, the more bite you’ll be able to put on the ball, but with a tradeoff on durability.
Eye X.Tech Black
The Eye X.Tech Black has a bit more power. It also comes in three gauges.