If you need to share your internet connection between a couple of buildings a few miles apart that have line of sight to each other then this point to point antenna might do the trick. The antenna is rated at 15 dBi and has a narrow beam width of 16 degrees horizontal/21 degrees vertical that is used to direct the wifi signal to a point up to about 3 miles away.
The antenna is built from aluminium alloy covered with a protective coat. Cabling options can be found below.