LASKO 3723 20 Premium Box 3-Speed Fan Type: Box Fan Fan Blade Size: 20 Speed Setting: 3 speeds Color: White Weight: 12 Feature: Three, Whisper-Quiet Speeds 30% More Air Velocity than Most Standard Box Fans Energy-Efficient, High Volume Air Movement Wide-Body Design for Stability U.L. Listed Step up to the Premium Box Fan and enjoy the benefits of the Wind Ring System, an exclusive grill design that focuses the air movement, increasing its velocity.