Item Type: Red Filter Color: Red Material: Aluminum Alloy + Optical Glass Package List 1 x Red Filter 1 x Storage Box 1Red Filter: Suitable for enhancing the red tones in the picture, making the scene more vivid and layered. 2Practical Accessory: For shooting scenes such as maple leaves, sunset, evening clouds, burning clouds or desert dunes in the evening. 3Aluminum Alloy Frame: CNC precise machining, screw thread installation, quick and convenient disassembly and assembly. 4Multi Layer Nano Coating Process: Lens has waterproof, oilproof, anti fouling, and anti scratch properties to protect the lens from dust and scratches. 5Applicable Models: There are three kinds of interfaces: 40.5mm/1.6in, 43mm/1.7in, 46mm/1.8in, 49mm/1.9in, suitable for 40.5mm, 43mm, 46mm, 49mm interface lens.