Ball bearing slide Size12",14",16",18",20",22",24" Finish:Plain,brass-plating,zinc-plating Features:1) Steel stainless steel2)Size12",14", ... 16",18",20",22",24"(250mm-600mm)3)Finish:Plain,brass-plating,zinc-plating4)Material thickness:1.0mm-1.2mmOuter packing ...