This animal pen drying fan attachment is a useful tool to provide air movement to multiple areas with one air mover. The attachment is designed to fit on the and is made to be used in animal pens and/or cages. Made up of three long 9' hoses with inside diameters of 4.75", the hoses can direct air into different animal enclosures to provide a cooling breeze to help cool your pets down or to provide fresh air to places that need it. Each end has 2 hooks that allow the end to attach to any kennel bars for simple setup. There is also a gate on each end that can be lowered on the end of each hose to restrict air to only the cages that need it. Each hose has an inside diameter of 4.75". For other ducting options, please check out our area.