Stainless Steel Mail Slot Sleeve 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: 11-1/2" x 2-3/4" x 1-3/4" Screw Holes are 12" Center to Center Packed In Individual Poly Bag With Mounting Screws. Stainless Steel Construction