1The lens uses highquality optical glass, highdefinition grinding treatment, does not affect the image clarity. 2The lens adopts multilayer nanometer coating process, and the lens has waterproof, oilproof, antifouling and scratchproof performance. 3The filter fits perfectly with the camera lens and is beautifully coordinated. Frame is made of highquality aviation aluminum. 4The real machine is moldopened, and the design is quick to disassemble and install quickly. 5The ND filter can reduce the amount of light entering, the camera can choose the correct exposure value to prevent overexposure. The coating light reduction process avoids the color shift of the traditional ND lens, and there is almost no color shift. Condition: 100% brand newItem type:NDFilterMaterial: Aluminum alloy + optical glassColor: blackSize: Approx. 3x3x0.85cm/1.2x1.2x0.3inWeight: Approx. 62gApplicable models: suitable for OSMO ACTION 1 Set x NDFilter(4pcs/set) 1.Thedoesnotincludesportscamerasandouterframes.2.Duetomanualmeasurement,pleaseallowanerrorof1& 8209;3mm.3.Duetodifferentshootinglightsanddifferencesbetweenmonitors,thepicturemaynotreflecttheactualcoloroftheobject.Pleasemakesureyoudontmindbeforeordering,thankyou