The Gauge disc made by Legacy Discs is now PDGA Approved as of 9-25-2013.
"Gauge, 5 5 0 1 - Put the Gauge on a line and it will stick to that line from release to landing. As fast as a midrange can get with control and excellent glide. Guaranteed to be a beginners first disc and a professional's 'go to'." by Legacy Discs