5.556mm 7.07mm 7.937mm Low Carbon Steel Ball Stainless Bulk Steel Balls for Belt and Roller Conveyors Shandong Jinnai International Trade Co., Ltd. Base Info Description Pre：7.35mm Soft Carbon Steel Ball HRC55-65 Polished Dia 9.525mm 12.700mm 19.050mm Carbon Steel Bearing Ball Next：Factory Directly Ome Polish Hole Carbon Steel Ball Making 6.9mm 7.937mm Steel Ball with Hole
