Armor Flex Small Door Mount Dog Door Deluxe Collars + Boot The MS-5 Pet Collar encompasses

The MS-5 Pet Collar encompasses the Ultrasonic family of our exclusive Pet Activated World System (PAWS)

Universal Line: Designed around the RX-10 Universal Collar

Others use a continuous magnet strip that is hard for your dog to open

tough vinyl flap

Armor Flex Small Door Mount Dog Door Deluxe Collars + Boot The MS-5 Pet Collar encompassesArmor FlexAir Tight Pet Doors High Tech Pet brings you the latest innovation in pet doors. Our new, Armor Flex premium aluminum pet doors are the best sealed, most secure, most energy efficient and best built pet doors on the planet. These superior pet doors feature our new, patent pending, flap design made of interlocking segments that provide horizontal rigidity to fully compress seals on the sides of the flap, while providing vertical flexibility