The cat flap comes with 4 locking options: in only, out only, opened and locked.
Measurements:
Overall size: 252 mm x 241 mm (93⁄4" x 91⁄4") Cut out size: 175 mm x 168 mm (63/4" x 61/2") Glass cut out: 212 mm (83/8") diameter circle Maximum pet shoulder width: 150 mm (57/8") Maximum pet weight: 7 kg
