Optimized Performance: ECO II Series 2207 motors are engineered for and durability to meet your racing or aerial photography needs. Advanced Engineering: ECO II motors are crafted with premium materials to deliver reliable, stable power for competitive FPV racing and smooth operation for 4K video quadcopters Small air for high power and improved efficiency Clockwise Rotation: Each motor features a clockwise (CW) thread configuration for easy installation and secure propeller connection Compatibility: Perfectly suited for a wide range of RC FPV racing drones and quadcopters, these motors are versatile for both amateurs and competitive racers seeking superior performance Testltem:KV1900 Motor Dimensions:Φ27.5 x 33.2mm Framework:12N14P Bearing Shaft:4mm Lead:20#AWG 120mm Idle Current (10V):1.4A Internal Resistance:59mΩ No.of cells:3-6S Propeller:5 inch-5.5 inch Current (6S):45A Max.Power (6S): 1130W Color: Silver Material: Metal Package Contents: 1 x Brushless Motor 1 set Accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.