1. High-definition optical glass is used, which has no effect on the image quality, provides low refractive list, and restores wonderful moments.2. Double-sided coating makes the face easier to clean.3. It weighs only 8.5g, which is compact and light, and can be traveled without burden.4. The rubber ring inside the frame effectively isolates water droplets and moisture, protecting your for Ace Pro 2 lens from damage underwater, rainy days and humid environments.5. The aviation-grade aluminum frame adopts a engraved matte black finish, which has strong corrosion resistance and is not easily affected by factors such as humidity and oxidation.Material: Aluminum alloy (frame) + optical glassApplicable models: For Insta360 Ace Pro 2Color: BlackNet weight: 0.53 oz (15.3 g) (1 set) / 1.44 oz (41.2 g) (4 sets)Package weight: 1.92 oz (55.1 g) (1 set) / 2.8 oz (80 g) (4 sets)Product size: 1.38*1.38*2.63 inches (3.53*3.53*6.7 cm)Package size: 3.54*3.58*0.53 inches (9*9.1*1.35 cm)Packing list: filter*1 wrench*1Packing method: boxed Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia