Comfortable fit: Made from high-quality materials, this replacement strap ensures a comfortable fit for your pet, allowing them to wear it all day without any discomfort. Great choice for a petsafe replacement collar 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. 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. Keep your pet safe and secure with our ECollar Replacement Strap, compatible with most major brands including Petsafe, Sportdog, and invisible fence collars - the perfect shock collar replacement for your furry friend. Make a great petsafe 1000 replacement collar. Pawsitive electric fence collar for dogs is compatible with most underground systems.