Fangrui Product Details 1. Optical Glass, Precision Grinding And Polishing, High-definition Imaging 2. Double-sided Multi-layer Nano-coating Process, Restore The True Colour 3. Double-sided Waterproof, Oil-proof, For Your Lens Protection 4. Aviation Aluminium Frame Material, Logo Engraved By Laser Engraving Not Fade 5. Cpl Adjustable, By Rotating The Gear Can Adjust The Light, Choose The Right Luminosity For Installation Not Damage The Lens, Change The Filter At Any Time, Do Not Let You Miss The Wonderful Moment. Cautions. 1. Only Uv Filters Can Transmit 98.5 % Of Light; Cpl Filters Cannot Be Expressed In Terms Of Light Transmission 2. Only Cpl/nd Pl Filters Are Adjustable, Other Filters Are Not. Type:b:cpl+nd8+nd16+nd32 Colour:black Material:aluminum Alloy Package Contents: 4 X Filter 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.