Features: Apply slow shutter speed under strong sunlight exposure. Neutral density filter, used to filter light. Control the amount of light in the 1 to 9 stepless adjustment. The outer ring can adjust the gray level arbitrarily, and can be transferred from ND2 to 400. Filters are great for removing unwanted reflections from non-metallic surfaces and increase contrast and color saturation. Specifications: Material: resin Color: black Diameter: about 37mm Package included: 1pc x ND filter 1pc x storage bag Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement. Neutral density filter, used to filter light. Apply slow shutter speed under strong sunlight exposure. Control the amount of light in the 1 to 9 stepless adjustment. The outer ring can adjust the gray level arbitrarily, and can be transferred from ND2 to 400. Filters are great for removing unwanted reflections from non-metallic surfaces and increase contrast and color saturation. Package included: 1pc x ND filter 1pc x storage bag.