ANTIQUE CAST IRON FLOOR GRATE. The item "ORNATE ANTIQUE CAST IRON FLOOR GRATE REGISTER VENT ARCHITECTURE HARDWARE 28X16" is in sale since Sunday, May 27, 2018. This item is in the category "Antiques\Architectural & Garden\Hardware\Heating Grates & Vents". The seller is "pickin4yuz" and is located in Uxbridge, Ontario. This item can be shipped worldwide.