Three ring gimbal with a ball. Also are included a file to print out just the gimbal rings with no pegs for a ball, and the OpenSCAD file so you can customize this - ring size, ball size, ring thickness, ball or no ball, number of rings, etc.Print either GimbalOnly for just the rings, or both GimbalWithBallPegs and GimbalBall and snap them together for the rings and the ball. I would not advise printing GimbalWithBallDisplay unless you like to print lots of support, but YMMV :)