1Polarized and neutral density filter for Hero 9 motion camera combines two popular filter effects in a single glass cover without the need for stacked filters. 2Made of 6H toughened optical glass, it is strong and scratchresistant, with reflective and waterproof coatings on both sides. 3Light reduction effect is achieved with a slower shutter to obtain atmospheric effect while providing an artistic motion blur. 4Adopts doublesided antireflection coating to improve the amount of light, to ensure no color bias, more fidelity. 5With 360 rotating frame, filter direction can be controlled to achieve the best effect of the polarizing lens. 6Polarized effect can effectively eliminate nonmetallic reflection, increase color saturation, and make the blue sky, green leaves, mountains and rivers, buildings and other colors more bright. Item Type: Camera Lens Filter Color: Black Weight: Approx.64g/2.3oz Material: Aluminum Alloy + Optical Glass Type: ND8-PL Filter/ND16-PL Filter/ND32-PL Filter Applicable Models: for GoPro 9 Sports Camera 1 x ND8-PLCamera Lens Filter 1 x ND16-PL Camera Lens Filter 1 x ND32-PL Camera Lens Filter 1. Do not put it in an environment above 40C.2. Do not use ethanol to wipe.