We are offering etching machine suny-zfs100. 1. usage: mainly used for copper etching on circuit board, then getting a very fine line;2. maximum etching size: 400mm*300mm;3. etching speed: 160s;4. with automatic convection device;5. dosage of etching liquid: 4l6l;6. with air-blow device accelerating etching process;7. heating temperature of the heater: adjustable 30 c 50 c constant temperature;8. power supply: ac220v/300w.