This high-quality product with its unique trimmable door liner enables neat, easy installation in all doors, panels and walls. Self lining to 50mm thick - ideal for all doors panels and walls. Silent action will not frighten pets or disturb owner. Transparent flap is preferred by most cats and is made from super-tough polymer. Draft and weatherproof fully brush sealed flap and magnetic closure with rainproof seal. Easy to use tamper-proof 4-way lock.