Inflatable style birds are ideal for blowing through ducts already occupied with cable(s). Unlike other manufacturer's, these inflatable projectiles are made of coated nylon that is stitched for greater strength. Inflatable Birds are available in four (4) sizes, covering a nominal size range of 3/4" to 6" ducts. The kit includes all sizes, making it easy to adapt to varying job sites and multi-cable occupied conduits.