Features:1. The Emax Avan Long Range propeller 6x3.8x2 was designed to maximize range of flight.AAvan Long Range is optimize to operate at 50 mph with a low current consumption at that speed to maximize range.2. Designed to be used on a 2207 1900kv motor to maximize range on 4s and allowing aggressive flying with 5s. A true constant 3.8" pitch throughout the blade gives a linear control feeling across the throttle band while still achieving high speeds.3. An aggressive and thick chord at the root of the blade helps maximize thrust and efficiency at the designed speed. This thicker chord also increases durability and increases the natural frequency of the blade which in turn minimizes vibrations in the quad.4. This will allow jello free footage. Best match for the Emax LS2207 1900kv motor on 4s.5. The Avan Long Range propeller was designed from the ground up starting from design constraints such as RPM, air speed, and required thrust. From these constraints aerodynamic models were built to predict performance and to design the blade shape.Description:Highly cambered airfoils were used to achieve high lift coefficients at high angles of attack prolonging stall. This allows for a higher blade angle while still remaining efficient.Specifications:Brand: EmaxMaterial: PlasticDiameter: 6 inchPitch: 3.8 inchBlade: 2 BladesPackage Included:4pcs * PropellerNotes:1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.