Features: - Design Specification: centered on IFMAR/ROAR Rule, IFMAR approved - Motor measurements (Diameter x Length) 35.8mm x 51mm - Shaft Diameter: 3.17mm - Magnet Dimensions (Diameter x Length): 12.5mm x 24mm(3.5turn~9.5turn), 12.3mm x 24mm(10.5turn~17.5turn) - Variable Endbell with changing the peformance associated with engine on output power and torque - Weight: ~170g - Recommended RC Model Car: 1:10, MINI Automobile