Ideal Pet Products Aluminum Sash Pet Door 33" Size:1.75 in. x 33 in. x 20.63 in. ? the flap automatically locks back

the flap automatically locks back into place

20 gauge wire

Neck Strap: 10" - 18"

By utilizing unique bark-sensing technology

Ideal Pet Products Aluminum Sash Pet Door 33" Size:1.75 in. x 33 in. x 20.63 in. ? the flap automatically locks backHigh quality white finish aluminum construction. Installs easily into most styles of aluminum sash windows. Features: Size: Small Dimensions: 1. 75" x 33" x 12. 56" For pets 2 12 lbs. Flap size 5" x 7" Adjustable width from 33" 38" Item Details: Size: Medium Dimensions: 1. 63" x 33" x 16. 63" For pets 13 35 lbs. Flap size 7" x 11. 25" Adjustable width from 33" 38" Item Details: Size: Extra Large Dimensions: 1. 75" x 33" x 20. 63" For pets 36 90 lbs.