The Inertia disc by MVP Disc Sports was PDGA Approved as of 2-10-2014.

"The Inertia is the grand debut of our 20mm wing distance driver class. This class of controllable distance drivers will all have a wide weight range from 155g to 175g. This allows for an unmatched GYRO™ Push to give throwers increased control in their distance drives. The Inertia's understable profile will allow high power throwers to achieve consistent hyzerflips that will carry far and accurately. It's neutral flight for low power throwers will allow for reliably straight distance lines with accuracy. The Inertia is set to release this year in late March or early April." - by MVP Disc Sports