Just got this set in from Amazon: Amazon.com: Neewer for DJI Phantom 4, DJI Phantom 3 Professional and Advanced, Multi-Coated PL-ND Filter Set: PL-ND4, PL-ND8, PL-ND16, PL-ND32, Made of High Definition Glass, Not for DJI Phantom 3 Standard: Camera & Photo for $50 and 2 day shipping from Prime. At first glance they seem to be good. Made of aluminum with glass lens and comes with a semi clear plastic case. I was considering purchasing the Taco RC set but I had read some threads that some sets are not labeled by the company. The Neewer set has a label on each lens as you can see. I'll test them out in the next few days and post some pictures so you guys can see.