The M10-II GND filter is made from aerospace aluminum and features an anti-color cast NanoPro multicoating that makes for a durable and easy to clean filter. Graduated Neutral density filters allow you to balance out the light in a portion of the image while leaving the rest of the image below the graduation line unaffected. The M10-II Grad ND filter features a cog wheel on top of the filter frame that allows you to rotate the filter and adjust the location of the graduation line. The M10-II drop-in filter line is made from aerospace aluminum and feature an easy to use pinch-and-release grip design. M10-II drop-in filters are compatible with both the M10 and M10-II filter holders.