Petsafe Stubborn Large Dog In-Ground Electric Fence PIG00-10777 20 Gauge 2000' For dogs 30 pounds and up Fits neck sizes 6-28 inches Waterproof receiver collar and uses 9 volt battery (included) 25 Acre Tranmitter 5 adjustable levels of static correction including Tone & Vibration Comes with Short & Long Probes, Battery 2000' 20 Gauge Superior Pro Solid Core Wire Continuous spool by Monell Pets