Specification: Type:BM3720A-KV500KV (rpms per volt):500 No load current:1.3 A @10 V Resistance:0.0931 ohms Watts:up to 580 Continuous Current:35 A Max Burst Current:49A, 10seconds Cells:34S Li-Po Recommended Props:9x 7.5 to 12x 7 Slots, Poles:12, 14 Diameter:38 mm Shaft: Diameter 5.0 mm Weight:115 g Motor outer diameter: 37mm Stator thickness: 20mm Brushless ESC:40 A Package included:1 x Detrum BM3720A3-KV500 Brushless Motor for RC Airplane Spare Part