The Mtroniks marine M400 brushed 5 pole motor is the smallest in the line of specially developed brushed motors for model boats. The M400 is a 400 can sized motor, sometimes referred to as 370 or 380 size, it is ideal for use in small scale model boats running between 6 and 12V. The M400 has standard pitch mounting holes of 16.0mm, M2.5. Running at 12V, at maximum efficiency, the M400 will run at around 10000RPM and pull around 2Amps. Start up current, depending on prop size, would be around 2.75Amps. Brushed design 400 can size 6 to 12V 20 Watts 5 pole super smooth running design Specially developed for small scale marine models Motor Type Brushed Motor size 400 RPM@12.0V 10000 Power 20W Stall current @12V 2.7A Shaft diameter 2.25mm Length 37.5mm Diameter 27.5mm Weight 65.0g