Gun Dog House Doors® durable kennel doors have aluminum and plexiglas flaps that closed with springs, there is an Easy door option as well
Aluminum frame and 1/4" Plexiglas flap
Endura Kennel doors are sold as a pair of frames and flaps only, do not include locking covers or hole plug covers and have the Endura Flaps
Revolutionary Endura flap is extremely weather tight
Kennel version has frame with flap, no cover...