High-speed "Inflatable Air Blower" Always use low speed fan uses ball bearing low-cost oil bearing. Oil-bearing fan with only one bearing; and ball bearings "Inflatable Air Blower" requires two bearings, single ball bearing, is "1Ball + 1Sleeve", still with the oil-bearing components. More advanced than the single ball is a double ball bearing, that TwoBalls. "Inflatable Air Blower" oil bearing life is generally 10,000 hours, 30,000 hours for a single ball bearing, double ball for more than 50,000 hours (at ambient temperature was set at 25 ℃ below).