Plastic transparent, silent hatch with 360 degree sealing (TPR) and magnetic closure with comfortable screw cap, with 2 tunnel elements for walls and deep doors Easy to install: this classic type of cat flap comes with Cutting Template and Installation Guide 4-Position Locking System: With the 4-Position Locking System, you can choose the locking system that works best for your cat and give them the freedom they need. Adaptable: The PetSafe Manual Locking Cat Flap easily adapts to the cutout size of Staywell 300 Series Cat Flaps Energy Efficiency: Durable insulating beads and two magnetic locking points reinforce insulation and therefore provide better energy efficiency Accessories: Additional extension tunnels available Buy for quick and easy mounting to thicker walls or doors Flip size 15 15.5 cm