Package Size - Spring Tension Design Heavy Gauge Wrought Brass SIZE Overall measurements 13 in x 3 625 in 330x92mm Inside opening 11 in x 2 in 279x51mm FEATURES Very large opening will accommodate catalogs and small packages Especially designed for use on exposed doors to prevent wind from forcing rain and snow through the slot Bronze spring keeps flap tightly closedat all times and permits vertical installation PACKED One complete set in a box with wood screws Set includes hinged exterior front plate and open interior back plate FASTENERS Standard package includes wood screws - Buy Now or get More Info on Baldwin Hardware - Click Here To Order