The GX-187 from Gas Pro Vanes is a small diameter shield cut vane designed specifically for compound bows. This unique and special design gives you speed and stability for any type of outdoor competition. These vanes were even used by Sergio Pagni to capture an Outdoor World Cup stage in 2017. This is our lightest and fastest plastic vane offered. We suggest using this vane on small diameter shafts to achieve the best performance.