Please note this product might take a little longer to arrive as it may be shipped from outside the uk. The staywell dog flap 640 is an easy and practical solution for you and your dog. The staywell dog flap is simply installed in the door or wall. With the 2 way closure system allows you to decide whether your pet can get in and out at any time or whether the door remains locked. The stable and flexible flap has a slightly milky colour and is particularly quiet. The aluminium frame gives the dog flap an elegant look and high stability at the same time. The 2 way closure system can be used for entry and exit locked door dimensions overall dimensions 502.6 x 329.1 mm cut out size 451 x 277 mm flap opening 260 x 413 mm size of the cut out 277 x 451 mm frame thickness fits doors and walls with a thickness of up to 51 mm at least 8 mm if excess aluminium tunnel has been removed frame depth inside, with installed closing plate 21mm inside, without installed cover plate 8.5mm external depth 4.6mm for maximum shoulder width 260mm for dogs up to max. 45kg general overview aluminium frame extra strong design 2 way closure locking through locking flap for large dogs 3 years guarantee