Brand: Extreme Dog Fence
The Perimeter Technologies Invisible Fence R21 Replacement Collar 7K – 1 Dog and Free Backup Collar Strap is a high-quality, durable collar that is designed to be compatible with most underground fence systems. The collar features a titanium alloy construction that is resistant to corrosion and damage. The collar also has a 7K frequency selection that ensures compatibility with most systems. The collar also comes with a free backup collar strap.