13-1/8" x 3-5/8" Solid Brass Mail Slot with Interior Flap Deltana is the architectural hardware manufacturer with a proven record for exceptional service and quality. Deltana inventories the country’s largest selection of architectural, lighting, and door hardware in over nine fine finishes made from solid brass, zinc, aluminum, steel and stainless steel. Dimensions: 13-1/8" x 3-5/8" Slot Door Dimensions: 11" x 2-3/8" Packed In Individual Poly Bag With Mounting Screws. Solid Brass Construction