The only pitot tube cover that disengages if you forget to remove it. Here's how this innovative product can help reduce aviation accidents and reduce liablility: Releases from the tube at a specific velocity and falls harmlessly away if you forget to remove it. Protects from contamination of pitot tube while on the ground. Bright color for easy visilbility during preflight inspection. REMOVE BEFORE FLIGHT clearly printed on PitotShields Designs for both blade and round type pitot tubes. Low-cost protection for pilots.