Cat Mate Lockable Cat Flap with 50mm Door Liner, White (Ref. 234W) A flap of uncompromised quality, the Cat Mate Lockable Cat Flap with Door Liner combines an easy to use slide lock with a unique trimmable door liner for neat, easy installation in most applications. Particularly recommended for wooden doors and walls. Product features Self lining to 50mm (2) 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 with magnetic closure Rainproof seal Easy to use, tamper-proof 2 way lock 3 year guarantee.