1. Multi-layer coating filter, high transmittance and high light to restore the true color2. Using professional optical glass lens, the image is clearer3. Protect your expensive lens from dust and scratches without degrading photo quality.4. Using this filter, you can get more freedom to control aperture and shutter, bring more exposure methods and creative space for photography creation, and effectively prevent overexposure. The number behind ND represents the ability of the ND mirror to block light.5. Material: Aviation aluminum alloy + optical glass6. Size: 32x7mm7. Weight: 6.3gSpecification: General Compatible with DJI: Osmo Action 3 Package Weight One Package Weight 0.07kgs / 0.16lb One Package Size 12cm * 10cm * 2cm / 4.72inch * 3.94inch * 0.79inch Qty per Carton 160 Carton Weight 13.80kgs / 30.42lb Carton Size 42cm * 25cm * 42cm / 16.54inch * 9.84inch * 16.54inch Loading Container 20GP: 604 cartons * 160 pcs = 96640 pcs40HQ: 1403 cartons * 160 pcs = 224480 pcs