Gon Bops Quinto (CA0975N) California Contour Crown Hoops for less pressure on wood and hardware, less effort required to tune Smart side and backing plates protect wood and hardware by strengthening areas under stress Smart Gon Bops design delivers extended tuning range and longer hardware life Crafted from the finest-grade quarter-sawn Appalachian Red Oak Maker Of Bells, Bongos, Cajon's, Congas, Djembes, Hand Percussion, Hardware, Parts & Accessories And Timbales