30mm Carbon Steel Ball Transfer Bearing Unit Table Conveyor Roller Ball for Furniture, Wheelchair Shandong Jinnai International Trade Co., Ltd. Base Info Description Pre：25.4mm Carbon Steel Ball for Drawer Slides Rolling Mill Solid Carbon Steel Ball for Retainer Curtain Auto 66.840g Next：Stainless Steel Balls Gym Sports Shooting Slingshot Catapult 6.350mm 9.525mm 12.7mm
