The Extreme Dog Fence system is packed with premium features that make it stand out in the crowded pet containment market. First and foremost is its high-quality boundary wire, available in standard 20-gauge or upgraded to heavy-duty 14-gauge for increased durability. Unlike other systems that use flimsy or unshielded wire, Extreme Dog Fence offers a thick, solid-core copper wire with a polyethylene jacket, ensuring it can withstand years of underground use. Another standout feature is the collar receiver, which is completely waterproof and submersible up to 10 feet.

https://www.amazon.com/Dog-Fence-Underground-Longevity-Continued/dp/B00ETAIE0A