Nflightcam 43mm Propeller Filter for GoPro Hero3, Hero3+, Hero4 Designed for use INSIDE the aircraft only, this filter removes the propeller in 90% of the conditions encountered on a typical VFR flight. Mount it inside your cockpit to capture your flight without distracting propeller artifact ruining your video! Ingenious design holds both the propeller filter and GoPro camera for mounting Compatible with GoPro Hero3, Hero3+, and Hero4 Silver/Black