Casualfashion 39.37" Windsock Outdoor Wind Sock Bag with Reflective Belt Suitable for:Meteorology, Chemical Industry, Environmental Protection, Agriculture, Oil Exploration and Other Industries. Middle:Length( 100cm/ 39.37" ) Air inlet diameter( 40cm/15.75" ) Package includes 1  windsock, not include others which show in picture. Model windsock, easy to fly, elegant figure, bright color with reflective fluorescence belts It is easy to install and widely used in meteorology, chemical industry, environmental protection, agriculture, oil exploration and other industries