This pair of ND1000 Camera Lens Filters from Freewell mount on the front- and rear-facing lenses of your Insta360 One R camera, reducing the amount of light reaching your camera's sensor by 10 stops. Each ND1000 filter is precision-made and mounts on the frame that comes with your Insta360 One R. The filters are coated to protect them from water, dust, scratches, oil, and to protect their neutral color rendition. Please note that these filters are made of optical glass, but even with their protective coating, you should treat them as you would any optical element. Each filter is labeled with its ND rating, and the pair come in a magnetic case to protect the filters during storage and transport.