This is an ND filter for your Phantom 3 Standard, which will help reduce the Jello effect on bright days. There are plenty of ND filters for P3 Advanced and Professional, but the standard is lacking. What filters do exist are really expensive. This allows you to press-fit any standard 37mm filters (I got mine on Amazon) onto your lens. It is light enough that it doesn’t interfere with the gimbal or hit the ground. Print time around 30 minutes on an Ultimaker 2.