Angles Adjustable filters are adjustable. You can rotate the black circle to get a satisfied angle for your requirements on polarizing. Professional Optical Glass Lenses With excellent grinding process, good physical and chemical properties.Make your pictures more professional. Multi-layer Coating Films & High Transmittance Restore of lens and capture clear image Water-proof & Oil-proof & Scratch-proof Effectively protect camera lens Filter Model:ND8/ND16/ND32/ND64/UV/CPL Applicable Models:for Action 5 Pro/4/3 Colour:As Shown Material:Optical Glass + Aluminum Alloy Package Contents: 6 x Filters 1 x Mirror cloth Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.