The iFlight Xing X1404 is a quality motor for lightweight 3-4" drones. The motor also uses rounded magnets in this size, which improve efficiency and increase traction. The motor bell is classically two-piece, making it easier to manufacture and more affordable. we recommend using on 4" propellers with 3S battery and 3" propellers with 3-4S battery. The motor has the same pitch of mounting holes as smaller motors of size 1106 and similar.