Airport Windsock: Made of quality material, lightweight, designed to withstand damage from wind, rain, and sun. Application: Easy to install; the directional windsock is widely used in meteorology, chemical, environmental protection, agriculture, and other industries. Wind Sock Bag with Reflective Belt: Easy to fly, features an elegant design with bright colors and reflective stripes. Outdoor Rainbow Wind Measurement Sock Bag: Secured with solid braided reflective strings and a durable metal clip. Aviation Ripstop Wind Sock Flag: Can indicate wind direction and strength at night, equipped with red reflective tapes for enhanced visibility. 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: Approx. 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 from the image.