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