Please note: This product might take a little longer to arrive as it may be shipped from outside the UK. The Petsafe Staywell Dog Flap 640 is an easy and practical solution for you and your dog. The Petsafe Staywell Dog Flap is built into the door or wall. With the 2-way-closure-system you get to decide whether your pet can enter and exit whenever it likes or if the door remains locked, and adjust it respectively. The flexible flap is especially low-noise. The aluminium frame adds an elegant appearance and high stability at the same time. The 2-way-closure-system can be used for: entry and exit locked door Measurements: Total size: 502.6 x 329.1 mm Cutout size: 451 x 277 mm For maximum shoulder width: 260mm For dogs up to max. 45kg Complete overview: Aluminium frame Especially sturdy construction 2-way-closure Locks through inhibiting valve For large dogs 3 years guarantee