Extension Rings 1.Material Thickness:0.8mm-1.6mm 2.Meet UL standard 3.Depth:1-1/2" 4.Resonable Price and High Quality 4" Octagon Steel Extension Rings with 1-1/2" Depth 1.Material Thickness:0.8mm-1.6mm2.Meet UL standard3.Depth:1-1/2"4.Resonable Price and High quality 4" Octagon Steel Extension Rings with 1-1/2" Depth
