Airport Windsock: Made of quality material, lightweight, to resist damage from wind, rain, and sun. Easy to install, this directional windsock is widely used in meteorology, chemical, environmental protection, agriculture, and other industries. Wind sock bag with reflective belt for high visibility and easy flight, featuring bright colors and reflective stripes. Outdoor rainbow wind measurement sock bag secured with solid braided reflective strings and durable metal clip. Aviation ripstop wind sock flag helps indicate wind direction and strength at night with red reflective tapes. Specification: Material: Oxford Cloth Size Chart: 60cm: Length: Approx. 60cm / 23.62inch, Inlet Diameter: 18cm / 7.1inch, Outlet Diameter: 10cm / 3.94inch 80cm: Length: Approx. 80cm / 31.50inch, Inlet Diameter: 23cm / 9.406inch, Outlet Diameter: 12cm / 4.72inch 100cm: Length: Approx. 100cm / 39.37inch, Inlet Diameter: 34cm / 13.39inch, Outlet Diameter: 17cm / 6.69inch 150cm: Length: Approx. 150cm / 59.06inch, Inlet Diameter: 45cm / 17.72inch, Outlet Diameter: 23cm / 9.06inch Package Includes: 1 Piece Windsock Note: 1. Please allow slight variation due to manual measurement. 2. Due to differences in monitor displays, the actual color may vary.