[ Silent Wings 4 120mm PWM High-Speed Black Maximum speed 2500rpm ]

[ Silent Wings 4 140mm PWM High-Speed Black Maximum speed 1900rpm ]

[ Silent Wings Pro 4 120mm PWM Black Maximum speed 1600 2500 3000rpm 3 gears ]

[ Silent Wings Pro 4 140mm PWM Black Maximum speed 1100 1900 2400rpm 3 gears ]