Sureflap Microchip Pet Door SUR101 in white with compatible tunnel extensions for a wall depth up to 370mm, with FREE UK Mainland delivery on all orders. Suitable for large cats and small dogs, this kit is ideal for solid and cavity wall installations. The generous flap sized is suited to pets up to 10kg in weight, with a maximum shoulder height of 34cm. Key Features Microchip-Activated: Works with your cat’s existing microchip, no need to wear a collar! Selective Entry: Keeps unwanted animals out! Optional Timed Curfew Mode: Keep your cats in at night! Battery-Powered: No wiring required, with up to 6 months of battery life. Versatile Installation: Fits doors, windows, and walls. Multi-Pet Friendly: Stores up to 32 pet identities. Flap Size 178mm x 170mm Frame Size 262mm x 281mm