An economically priced flap with uncompromised quality. This lockable flap features an easy-to-use slide lock and is particularly recommended for thin panel doors and screens. Self lining from 0mm to 13mm thick. 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 weather proof fully brush sealed flap with magnetic closure and rainproof seal. Tamper proof open/close lock.