This high quality product with its unique trimable 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 rainrproof seal. Easy to use tamper-proof 4-way lock.