... principleFeeding automatically,slotted automatically,curved arc automatically(no computer)with computer,optionalProcessing aluminium slotted angle45-120(flat panel profile ... . 7. Nontoxic, environmentally friendly products are certified by SGS. 8. Antistatic and easy to clean without cleaning, anti-fingerprint capability. 9 ... , the oxide will never fall off.Samples: Auto Bender Machine for aluminum