• Non-toxic, durable, and weather-resistant ABS material. • Door with 4 modes: entry only, exit only, fully closed, fully open. • Sturdy and silent cat flap, suitable for wooden and glass doors and windows. • Soft flannel inner frames to prevent scratches and clean pet fur. • Easy to assemble and disassemble, suitable for brick walls, wooden, PVC, and metal doors. • Outer size: 19.7 x 19 x 2 cm, inner: 17 x 16 cm. • Entry and exit control system for pet freedom of movement. • Transparent and solid plastic cover, easy for pets to open. • Installation instructions included: draw square, drill holes, insert and screw.