Sub250 NF16 is a small toothpick frame for 1.6" (40mm) propellers. A drone of this size is ideal for flying in a garden or park or even indoors. The frame can accommodate classic AIO boards with a hole distance of 25.5x25.5mm. Diagonal motor spacing is 77mm. The bottom plate is milled from 1.5mm thick carbon. The arms are prepared for motors with three 1.4mm diameter holes.