iBM2820X 1450KV Specifications:
-KV: 1450kv
-Size: 35x42mm
-Shaft: 5mm
-Battery/Esc: 3-4s Lipo / 37.5A
-Watts: 543
-Prop: 12x5/11x7 
-Weight: 102g
-Motor mounting holes 16 and 19mm.