Description Length Finish AID4183 - 1-5/8" x 3-1/4", 12 Gage AID4121 - 1-5/8" x 1-5/8", 14 Gage AID2141 - 13/16" x 1-5/8", 19 Gage 10ft and 20ft Plain, Pre-Galvanized, Hot-Dip Galvanized