Yeah Racing Tornado High Speed Cooling Fan 40x40mm for Motor Heat Sink #YA-0327 Yeah Racing Tornado High Speed Cooling Fan 40x40mm for Motor Heat Sink #YA-0327 For: RC Cars, Material: Plastic, Color: Black Fan Size: 40*40*10mm, Operating voltage 5-8.4v, Start-up voltage 3v Weight: 13.0g, Plastic Blade and Frame Housing, Dual ball Bearing Stainless steel shaft core, Wire Length 250mm, Connector JST