Pet Door, 14.25" x 21.1" Metal Frame with Lock and 3-Flap System, Weatherproof Doggy Door, Easy to Install in Interior or Exterior Walls, Pet Door Suitable for Cat Doggie Kitties (White-large)Comprehensive ProtectionAdvanced TechnologyQuick Suitability CheckEasy AccessStylish and VersatileHigh-Quality Brush StripsFlap Size: 10.25 x 16.25 in/260.4 x 412.8 mm,Item Model Number: CWM02-L,Flap Material: Pvc,Frame Material: Metal,Applicable Wall Thickness Range: 4.75-7.25 in /120.7- 184.2 mm,Net Weight: 15.9 lbs/7.2 kg,Frame Size: 14.25 x 21.10 in/362 x 536 mm