World Model 28/312 Ducted Fan용 (3030Kv) 4Cell용 Kv(rpm/v) : 3,030 Operating Power : 660W Operating Voltage : 6 - 15V Operating Current : 45A Peak Current : 60A(Max15s) Internal Resistance : 28밀리옴 Diameter : 28mm Length : 31mm Weight : 60g Shaft Diameter : 3mm Mounting Screw : M3(Front), M2(Back) Distance of Mounting Holes : 16mm & 19mm