Elastic strap for comfortable fit Replacement or additional collar for magnetic key access with comfortable elastic strap and quick release plastic buckle clasp. The magnetic key pendant can be detached and fitted to an alternative collar if required. Compatible with the Staywell Classic and Deluxe magnetic cat flaps from PetSafe. Features & Benefits Elastic strap for greater comfort Quick release plastic buckle clasp Includes magnet key pendant Replacement for lost collars Use with Classic and Deluxe cat flaps