This is a 330 feet spool of our 18 AWG boundary wire specially designed for the Dogtek EF-4000 electronic dog fence.
The green polyethylene jacket provides excellent physical protection as well as static and oxidation resistance and it is burial approved.

How much wire do you need?
Use this table for a good estimate of what you'll need for your installation.
All these are estimates based upon a square lot, but should be fairly accurate regardless of the shape of your property.
Remember you'll need additional wire for interior or garden loops and to make the connection between the transmitter and perimeter loop.