There is a special place where there is a strong point of the three, there are nearly double the largest 6.23KG filter paper capacity, increase with the main cotton filters, which can reprovision micro-filter or filters can filter 0.3-0.1 Micron dust. They are widely used for micro-electronics, bio-medicine, optical fiber cable, food and beverage, precision instruments, semiconductors etc. Specifications: power consumption: 1200W consumption: 1300W voltage: 100-220V vacuum suction: >=20kpa suction: 270W air flow rate: 38liter/s Vacuum pressure: 2270mm/WG Easy-to-empty transparent dust tank Feature: 1) 2000 hours continuous operation 2) speed: 19800rpm/min 3) overheating protection switch for motor