BIO "Buy It Once" Interchangeable Fi Series 3 BioThane Collar

Our BIO "Buy It Once" Interchangeable Fi Series 3 BioThane Collar allows you to remove the entire Fi piece WITH the endlinks and move them to any other Paws For A Future Fi combatable collar! 

Additional Backing Pieces AND Fi Series 3 endlinks are sold separately.

Fi Series 3 tracker NOT included. 

Disclaimer: This interchangeable collar system requires a flathead screwdriver (not supplied) for backing exchange. With proper tooling, backing piece replacement can be completed in under two minutes. While a single screwdriver is sufficient for standard installation, optimal strength is achieved using dual screwdrivers operated simultaneously in opposing rotational directions. This technique ensures maximum structural integrity of the connection points, preventing potential loosening during active wear conditions.