Interesting little 3 to 6 Vdc motor fitted on a flange making for easy mounting on a ply or balsa model aeroplane bulkhead.
Length Total : 61 mm (Shaft 20 x 2.37mm, body: 32 x 19mm dia. Plastic flange: 25x25 x 3mm excl.16 x 4mm web )
two polorised threaded power connecters. (presumed M2.5) four 2mm dia. mounting through holes (easily opened up)
weight: 30 gms. RPM stated at 10,000
OK, so probably not for your £4000 drone, but great for a youngsters first balsa aeroplane that flys around in a loop teathered to the ceiling.