Home Slickdeals Polar Pro ND4, ND8, ND16 Filter Set for DJI Mavic Air Drone... Slickdeals Polar Pro ND4, ND8, ND16 Filter Set for DJI Mavic Air Drone $20 + free s/h By ARCOM - 24 April 2020 125 0 SHARE Facebook Twitter Go to the deal page: Polar Pro ND4, ND8, ND16 Filter Set for DJI Mavic Air Drone $20 + free s/h