Nylon E Collar Replacement Strap - Shock Collar Replacement Collar, Fence Collar Replacement, Compatible with Pet Safe & Invisible Fence & Fits Most PetSafe Collars Durable design: With its durable construction, this replacement strap is built to last, providing long-lasting use for your pet's training needs. It makes a great upgrade to your standard petsafe wireless fence collar and replacement collar for shock collar. sport dog collar replacement Adjustable size: The e collar replacement strap is adjustable to fit pets of various sizes, making it suitable for different breeds and ensuring a secure fit. Makes a great dog collar pet safe collar replacement for underground fence Adjustable Sizes for a Perfect Fit: Available in Small (up to 12”), Medium (up to 18”), and Large (up to 27”). Features 3 precision laser-cut holes with 1-1/4” and 1-5/8” spacing (center-to-center). Fits Invisible Fence (Micro Lite, R21, R51), eXtreme Dog Fence (Standard, Pro Grade, Max), PetSafe (UL-275V, UL-250, PUL-250/275, PIF-275-19, PRF-275-19), Innotek SD-2225, Pet Guardian PG-250, Perimeter Tech, Dog Watch, and Pet Stop. How did we get our start? We founded Gracie To The Rescue with the mission of providing durable pet products while also helping shelters in need. To The Rescue has given us the opportunity to help shelters and rescue organizations across the country. What makes our products unique? The products we source and sell are all developed in response to the most needed items from rescue donation lists. Why do we love what we do? We believe that every dog deserves a loving home, and we are proud to support local shelters and rescue organizations.