Cat flap operated by magnetic collar keys. Reduces access by other cats. Made from weather resistant plastic. Endorsed by Staywell. Includes four way manual locking system. 2 magnetic collar keys provided. 4 way lock. Suitable to fit any wooden door, wall or partition up to 5.4cm thick. Overall size (H)22.4, (W)22.4, (D)9.9cm. Door size (H)16.9, (W)16.9cm. Manufacturer's 3 year guarantee.