(1)material: CGr15,chrome steel, stainless steel (2) quality: Z1V1,Z2V2,Z3V3, ISO9001:2000 certificated (3) low vibration, low noise, high precision and durable (4) short delivery time, mainly 10-20 days since order confirmed (5) supply full range of deep groove ball bearing (6) high cost effective,widely applied to electric motor,pump,constrution machine,home appliance,instrument,cluth etc.