Fotodiox Four (4) Piece Filter Kit for DJI Phantom 3 and 4 Drone - ND4, ND8, ND16 and PL Filters for Phantom 3 and 4 Cameras 4-Filter Kit: ND4(2-Stop), ND8(3-Stop), ND16(4-Stop), and Polarizing Filter Perfect slip-on fit for the DJI Phantom 3 Standard and Phantom 4, Professional, Advanced and 4k Camera Units Premium Grade Optical Filter Anodized Aluminum Filter Ring 24 Month Manufacture Warranty