Jinnai Brand Guide Bush and Guide Pillar, Copper Ball Bearing Cage, Bronze Stainless Steel Ball Bearing Bush Shandong Jinnai International Trade Co., Ltd. Base Info Description Pre：500mm Hollow Steel Half Ball Next：5.556mm 6.350mm 7.937mm 8.731mm Drilled Stainless Steel Hollow Ball for Corrosion Resistance, Magnetism
