Introduction: 1. CPL circular polarizing filters are ideal for removing unwanted reflections from non-metallic surfaces such as glass or water. 2. Capture richer landscape photos and improve the clarity of distant objects by reducing haze and enhancing color saturation. Features: 1. Universal clamp design allows attachment of any 37mm threaded DSLR professional lens to your mobile device. 2. Premium optical glass helps reduce light reflections around the edges of the lens. 3. HD lens technology helps minimize flare and ghosting caused by internal reflections. 4. Compatible with most cell phones where the distance between the camera lens and the top edge is less than 1 inch. Parameters: Brand: ZOMEI Type: CPL filter Lens material: Glass, aluminum-magnesium alloy Filter diameter: 37mm / 1.45 inches Packing list: 1 x ZOMEI CPL optical filter Note: 1. Due to differences in monitor displays and lighting conditions, the actual color of the item may vary slightly from the image shown. 2. Please allow 1–3 cm variation in measurements due to manual measurement methods.