Package Size - Spring Tension Design Heavy Gauge Wrought Brass SIZE Overall measurements 10 in x 3 in 254x76mm Inside opening 7 5 in x 2 in 191x51mm FEATURES Especially designed for use on exposed doors to prevent wind from driving rain and snow through the slot The flap is furnished with a spring to keep it tightly closed at all times May be installed in vertical position PACKED One complete set in a box with wood screws - Buy Now or get More Info on Baldwin Hardware - Click Here To Order