This 3-Filter Neutral Density Kit was put together by Tiffen for the DJI Mavic 3 Pro to offer multiple aperture and shutter speed options for Mavic 3 Pro operators. The filters are made from optical glass with waterproof and scratch-proof multi-coating, which reduces reflection and maintains clarity and color fidelity. The filter rings are made from aluminum, they have a rectangular shape, and the kit includes a metal case to protect and carry them.