The attractive circular styling of this 4-Way locking flap is popular for wooden doors in addition to glass and acrylic. It is particularly recommended for single/double glazing. Self lining to 32mm thick – ideal for all single/double glazing and any panel from 2 – 32mm thick. Silent action will not frighten pets or disturb owner. Transparent flap is preferred by most cats and is made from a super tough polymer. Draft and Weatherproof, fully brush sealed flap with magnetic closure and rainproof seal.