Black tension band 3". Used to attach chain link to terminal post. Also available in galvanized. Tension bands are used to keep the chain link fabric tight and secure by attaching the tension bar to the fence post. You should have one less band per height footage. Details How the part fits? 3”square tension band is designed to fit around a 3” square terminal post. Where is it installed? 3” square tension band is installed by sliding over the 3” square terminal post once the post is set. Tension bands will be evenly placed on each terminal post. How many do you need? You will need multiple tension bands for every stretch of fence. You will need one less tension band than the height of the fence, with a minimum of 3 tension bands. For example, if you have a 4’ fence you will need (3) 3” square tension bands per terminal post. For a full stretch of fence from terminal post to terminal post, you will need double the amount. Ex: For a 4’ stretch of fence you will need (6) total 3” square tension bands. Specifications 3" post size outside diameter,.16lbs Instructions A 3” square tension band is installed by sliding it over the 3” square terminal post once the post is set. You will need to space the 3” square tension bands evenly on the square terminal post. Then you will slide the 5/16” x 1-1/4” bolt through the tangs and tighten the nut around the tension bar.