Durable 5/8" inside diameter molded poly plug and unmistakable Plane Sights Remove-before-Flight streamer are a perfect easy-on, easy-off pitot tube cover solution. The blazing yellow color of this foot-long, ANSI-compliant and weather-resistant reflective streamer stands out equally well in daylight or darkness under all weather conditions, so it can't be missed. The poly plug is attached to the streamers rugged black oxide coated zinc eyelet with a stainless steel ring. 3/4" Rust resistant, fade resistant and like every other Plane Sights product, guaranteed for two years!