Staywell Large Heavy Duty Aluminium White Clear Flexi Pet Flap/Door

Aluminium Large Pet Door 640 - Heavy Duty White Finish with Flexible Flap. No more 
scratched doors. No more getting up late at night. Energy efficient - keeps out drafts.
Steel locking security cover. For large dogs up to 45kg (100lbs) 
Overall size: 502.6mm x 329.1mm (19 13/16" x 12 15/16"). Cut out size: 451mm x 277mm 
(17 3/4" x 10 7/8"). Maximum pet shoulder width: 260mm (10 1/8"). 3 Year Guarantee.