Top Features . Smooth Video OutcomeHD ImagesWater oil and; scratch resistantEasy to take offLight yet durable These ND filters from PGYTECH provide the perfect exposure on your aerial shots with the subtle filter. These filters offer increased exposure and create a dynamic blur to your shots.The German SCHOTT glass and the treatment these received in production makes them scratched and water resistant so you dont have to worry about random marks appearing in your shots while also getting the HD shots during flight. Specification . Weight 2.9g eachSize 30 x 24.9 x 10.8mm. .