... ISO9001.2008, 3.Material: Bearing steel, 4.Various size and type, 5.15-30days delivery. Insert ball bearing:(1)Type range: UC201~215 ... mm Metric and Inch size available,(3)Material: chrome steel, stainless steel, Thermoplastic, Zinc Alloy, pressed steel house.Bearing Housing Product ... single white box 3. Single color box + carton + wooden pallet. Insert Ball Bearings CSB200 series inch dimension