thanks for your interest in our company.our company has UL,CE.GOST,ISO14001,ISO9001,KEL,PL and so on.heating film is clear to give big convenience and beneficial and also economic efficiency. but it is not product that can overlooks safety and is handled easily. and we are thinking that easily made product can give customer big damage.in this respect. we all must do our best for equipment investment to keep quality and we think have to lead market carefully.thank you so much.DAESUNG ENC CHEOL HO KIM