• Versatile flap door for medium-sized dogs and cats, adaptable to wood, metal, glass doors, and masonry walls. • 4-way locking system: allows setting free entry and exit, entry only, exit only, or fully locked. • Wind Stopper system prevents drafts from entering the home. • Direction indicator showing the last way the animal passed through. • Door opening of 21.8 x 25.5 cm for comfortable passage. • Made of durable plastic with impact damper for quiet and gentle use. • Includes installation tunnel and total dimensions of 31 x 9.6 x 38.4 cm.