Airport Windsock: Made of quality material, light weight, to prevent damage from wind, rain and sun. Application: Easy to install, "Directional Windsock" widely used in meteorology, chemicals, environmental protection, agriculture, and other industries Wind Sock Bag with Reflective Belt: Easy to fly, elegant figure with bright colors and refective stripes. Outdoor Rainbow Wind Measurement Sock Bag: Secured with solid braided refective strings and durable metal clip. Aviation Ripstop Wind Sock Flag: Can indicate wind direction and strength in night, to let you get the experiences of detecting wind direction with red reflective tapes. Specification: Material: Oxford Cloth Size Chart: 60cm: Length: Approx. 60cm/ 23.62inch, Inlet Diameter: 18cm/ 7.1 inch, 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 slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!