Power ash filter NRJ902C-20L Material: Metal (tank); PP (head cover) Power: 800/1000/1200W Voltage: 230V Frequency: 50HZ Capacity: 18/20L Vacuity: not less than 16/18kpa Decibel: 80db Net weight: 7.0/7.3kg Measurement: 31.5*31.5*39.0/42.0cm QTY : 18L: 700PC/20FT ; 1500PC/40FT ; 1700PC/40HQ 20L: 600PC/20FT ; 1400PC/40FT ; 1550PC/40HQ Feature: 1. Blowing function, 2. it can clean the heap filter itself by press the red button 3. Dustproof switch 4. Can with bottom seat