TreeWorks Chimes - StudioTree™ - Medium 28 thin bar single row for acoustic low volume settings and recording - Hand-tied w/ braided CordLoc to last (NO PLASTIC TIES) - Polished & T-6 Tempered bars for brilliant tone - Thin 1/4-inch solid Aluminum/Titanium alloy - Hand-finished Tennessee Black Walnut Mantle - Handmade in Nashville, Tenn., U. S. A.