Cat mate lockable cat flap. Secure locks, weather proof, draft proof.2 Way LockingAn quality economically priced flap. The lockable flap features an easy to use slide lock and is particularly recommended or thin panel doors.Self lining from 0mm (0″) to 13mm (1/2″).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.Tamper proof open/closed lock.