Country Brook Petz | Replacement Collar for Dog Fence Receivers - Country and Western Collection Customizable length allows you to adjust to the perfect fit. When we ship it to you, it is sized 1 inch wide and stretches out to 30 inches long. Once you receive the product, measure your pups neck and cut to length. Features two holes for collar systems. This design can be used with Petsafe models: IF-100, RFA-48, RFA-41, PIF-275, PIF-275-19 , PIF-300, PUL-250, PUL-275, PIG00-13737, PRF-275-17-19,PRF-3004W, PRF-304W, PIG00-14673, PIG00-13661, PIG00-14582, PIG00-10777, MIG00-10939, MIG00-10938, ZIG00-1465. The silky soft polyester will wear like a hug, all while giving you the assurance of strength and durability. Made with a plastic buckle and triglide, this collar does not have any metal. If you have any questions, please give us a call at (256)974-0700